林佳（林巧洳）
保持清醒翻译成英文是“stay awake”。
重点词汇：awake
一、单词音标
二、详尽释义
三、词形变化
四、短语搭配
五、词义辨析
rouse，arouse，awake，wake，waken这些动词均有“唤醒、醒来”之意。
六、双语例句
丹儿你个丹儿
保持清醒英文是keep awake。
keep
音标：英[kiːp] 美[kiːp]
释义：
v. 保持; (使)处于; 继续(做某事); 使耽搁;
n. 生活必需品; 生活费用; 城堡主楼;
短语搭配：
例句：
1、You'll need to keep a clear head for your interview.
你面试时需要保持清醒的头脑。
2、I like to keep in shape.
我喜欢保持健康。
3、We kept up a correspondence for many years.
我们保持了很多年的通信联系。
qingkong88888
这句话的意思是：卫兵睁大眼睛转过来，脸上露出警觉的神色。watchful 和alert的区别watchful 指注意那些危险的或有潜在危险的事物: a watchful parent with a toddler in tow 一个注意照看蹒跚学步的小孩儿的家长。alert 强调认识及反应的快捷性: alert enough to spot the opportunity when it came 当机会到来的时候充分认识到并攫住它。总之，watchful 强调知道有危险的前提下的提起注意和警惕. alert 强调是很快地发现、认识和反应，不一定是对危险提起注意。比如当你的恋人坐在你身边的时候，你就会时刻注意她的一举一动，以便快速地作出反应，这个就是alert，可是如果是你的仇人坐在你身边，你还是会时刻注意其一举一动，防止他攻击你，这个就是watchful 。
happysky4496
The humanity moves to the ecological environment has the frontage influence,also has the negative influence.The frontage influence causes our environment to be better,but the negative influence must bring to our high attention.Appears since the humanity on the Earth,humanity's activity caused in the biosphere the material circulation to speed up; The humanity uses own wisdom,through the high tech method,has improved the soil,has created the new variety; Humanity's industrious work caused the barren hill to turn the green and glossy farmland,caused the desert to turn the oasis; Our country constructs "three norths" the protective forest,effectively has suppressed the desert spread.At the same time,Humanity's activity destroyed the biosphere harmony,has broken the ecological equilibrium,has created the ecological environment suddenly worsening.We must use own wisdom,own talent protect our homeland,lets the environment which we lives be happier
