in time, on time(1) in time 除了译作“及时”，还可译作“最终”或“总有一天”。
Her helping me in time saved me plenty of time.
她的及时帮助使我省了很多时间。
(2) on time，意为“准时”
Everyone is requiredtobe present atthe party on time.
要求每个人准时参加聚会。
time 组成的词组已学过的还有: at a time (一次), in no time (立刻), at that (the) time(那时), at times (有时), at any time (在任何时候)等。
persuade, advise两个词都有“劝”之意，persuade表示结果，advise只强调动作。
We advised (or: tried to persuade) him to stop talking,but hc refused.
我们劝(试图劝服)他别谈了但他不听。
I persuade him to stop smoking. tie now looks better.
我劝服他戒了烟。现在他看上去更健康了。
[注意] persuade 表示“说服某人做/不做某事”除了persuade sb. to / not to do...结构，还有persuade sb. into doing sth. / out of doing sth. 如：
He persuaded me into leaving soon.
他劝服我马上离开。
dead, deadly, dying三个词都可以作形容词，但含义各不相同。dead意为“死了”，反义词是alive，表示死亡状态;deadly意为“致命的”表示抽象意义;dying意为“临死的”。
The dog has been dead for hours.
这条狗死了几个小时了。
That is a deadly snake.
这是一条致命的蛇。
The dying man tried to my mmething.
这个快死的人试图想说什么。
[注意] dead，dying可在前面加 the 作名词用;deadly还有“死气沉沉”之意。如：
The dead (dying) were being taken away from the spot.
当时死者 (快死的人) 正从现场被抬走。
The lecture is deadly. Many began to leave.
演讲太沉闷了。许多人开始离开。
observe, watch当“观察”来讲时，observe相当于watch carefully，尤其用于实验或研究等场合。具体来说，observe含有“察觉到”的意思，watch意为“盯着看”。
watch 还含有“观看(比赛、电视)”等，而observe没有此意。另外，watch还有“照料”之意，相当于take care of。还有“当心”之意，相当于be careful with。
She has observed the stars all her life.
她一生都在观察星星。
I'll watch the baby while you are away.
你不在时，由我照料你女儿。
You'd better watch Mr Smith, I think he is a thief.
你最好当心史密斯先生，我想他是个贼。
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