Adjective:

1. engaged in or accustomed to close observation;

   "caught by a couple of alert cops"
   "alert enough to spot the opportunity when it came"
   "constantly alert and vigilant, like a sentinel on duty"
   

2. experiencing or accompanied by sleeplessness;

   "insomniac old people"
   "insomniac nights"
   "lay sleepless all night"
   "twenty watchful, weary, tedious nights"
   

1.警觉的;警惕的
Someone who iswatchful notices everything that is happening.

e.g. The best thing is to bewatchful and see the family doctor for any change in your normal health...
最佳的做法是保持警惕，一旦你的身体状况有任何变化就立即去看家庭医生。
e.g. He looked tall and powerful and, with his dark,watchful face, a little threatening.
他看上去又高又壮，面色黝黑，满脸警觉，真叫人有点害怕。

2.在(某人)的警觉目光下；在…的监视下
If you do somethingunder the watchful eye of someone who has authority over you, they watch you carefully to make sure there are no problems.

e.g. There were demonstrations in the streets today, under thewatchful eye of police...
今天，在警方的监视下大街上进行了游行。
e.g. Children swim at the pool, under thewatchful eye of lifeguards.
孩子们在救生员的监护下在水池里游泳。

3.看护;提防
If youkeep a watchful eye on someone or something, you watch carefully to make sure there are no problems.

e.g. Keep awatchful eye on babies and toddlers.
要看好婴儿和刚会走路的孩子。

1. 警觉的：技巧的skillful; adept; dexterous | 警觉的alert;watchful; on guard; wary of | 忍受bear; put up with; endure; stand

2. 注意的：watcher 看守人 |watchful 注意的 |watchfully 警惕地

3. 注意的警惕的戒备的：watcher 值班者值班员指示器 |watchful 注意的警惕的戒备的 | watching device 监视装置

4.

4. 注意的,警惕的：wasteful 消费的 |watchful 注意的,警惕的 | waterfall 瀑布

You must be watchful of your health.

你必须注意你的健康。

They were not very watchful of the traffic lights.

他们并不很注意红绿灯。

We should be watchful of computer viruses.

我们应该警惕计算机病毒。

The guard should be watchful during the night.

警卫在黑夜里也应该警醒。

Her expression was watchful and alert.

她露出一副察言观色、处处提防的表情。

His mother kept a watchful eye on him.

他的母亲特别留心他。

The children played under the watchful eye of their teacher.

孩子们在老师的看护下玩耍。

The best thing is to be watchful and see the family doctor for any change in your normal health...

最佳的做法是保持警惕，一旦你的身体状况有任何变化就立即去看家庭医生。

He looked tall and powerful and, with his dark, watchful face, a little threatening.

他看上去又高又壮，面色黝黑，满脸警觉，真叫人有点害怕。

There were demonstrations in the streets today, under the watchful eye of police...

今天，在警方的监视下大街上进行了游行。

Children swim at the pool, under the watchful eye of lifeguards.

孩子们在救生员的监护下在水池里游泳。

Keep a watchful eye on babies and toddlers.

要看好婴儿和刚会走路的孩子。

Or again do battle to acquire virtues, and then remain watchful in order to guard them.

另一方面,我们应该要努力奋斗、养成美德 、 保持警醒,随时守护自心的善行.

Under the watchful eye of the demon, wander alone in the formless Chaos.

在恶魔的警惕之眼下, 独自在无形的混乱中漫步.

He a silent guardian, a watchful protector.

他是静默的守护者, 是黑夜的看守人.

By the most watchful effort he did get twenty cents more, but it was painful.

经过十分谨慎的努力,他真的又讨到了2毛钱, 但这事多么让人难受.

She was watchful for any sign of activity in the empty house.

她对空房中的任何动静都很警觉.

They attended dances under the watchful eye of their father.

他们是在他们父亲的监视下参加舞会的.

We must be on our guard, watchful, prepared, vigilant.

我们必须当心 、 警惕 、 有准备和警醒.

One alternative to surgery may be watchful waiting.

一种外科治疗的替代办法可能是密切观察等待.

Be watchful for pickpockets.

小心扒手.

Nor fear those watchful sentinels.

不要畏惧那些警觉的哨岗.

He committed hooliganism even under the watchful eyes of the people.

他竟在众目睽睽之下犯下了流氓罪.

The children played under the watchful eye of their father.

孩子们在父亲的小心照看下玩耍.

Aleck , ever watchful saw a great and risky chance, and took a daring flyer.

密切关注形势的艾莱柯看准了一个绝好的冒险机会, 大胆炒了一把股票.

Schryhart, Hand , Arneel and Merrill were quietly watchful.

希利哈, 韩德, 阿尼耳和麦利耳都在静静地注意着.

Elfin riders sat them, watchful of a sign.

小精灵般的骑手跨在马上,机警地等待着信号.

The business has the watchful supervision of the proprietor.

该企业处于企业主的严密监督之下.

A vital element in the balanced operation of democracy is a strong, alert and watchful opposition.

民主要想稳步运行,一个强大的 、 警醒的反对派必不可少.

Today, the dwarves still keep a watchful vigilance up.

今天, 矮人们依旧保持着警觉性.

Take above as your mother's watchful eye.

教室里的灯光就是妈妈期待的目光.

The watchful sentinel is happier than the soldier who sleeps at his post.

一个儆醒的哨兵,要比一个站岗睡著的士兵要来得快乐得多.

• Ever anxious and watchful of her mother.

  出自：She