作者：吴安运
1. To ensure safety, the train is controlled by an advanced computer system.
ensure用作动词，意思是/"确保；担保/"，常用于以下句型：
①ensure that... 保证......
I tried to ensure that everybody understood the instructions. 我设法确保每个人都明白这个说明。
I can/'t ensure that he will arrive there in time. 我不能保证他及时赶到那儿。
②ensure sb. sth. 确保某人某事/物
This medicine will ensure you a good sleep. 这药会确保你睡个好觉。
2. It will not be business as usual in the future.
as usual 意思是/"像往常一样；一如往常/"。
As usual, there weren/'t many people at the meeting. 像往常一样，来开会的人不多。
Yesterday morning she came into the classroom as usual. 昨天早上她像往常一样进入教室。
【提醒注意】usually为副词，也有/"通常；往常/"的意思，常放在be后、情态动词或助动词与动词之间，为加强语气也可置于句首。
You don/'t usually arrive late, do you? 你通常不迟到的，是吗？
Usually she gets up very early. 通常她起得很早。
3. They are careful about what they eat and exercise regularly.
be careful意思是/"注意；当心/"，常用于以下句型：
①be careful to do sth.
Be careful not to be late for class. 小心上课不要晚了。
②be careful (that)...
Be careful that you are not late for class. 注意上课不要迟到。
③be careful about / of (=take care of)
Be careful of your health. 注意你的身体。
④be careful (in) doing sth.
Be careful (in) crossing the road. 过马路时要小心。
⑤be careful with sth.
Be careful with your work. 工作要认真。
4. Advances in medical science have also allowed us to deal with new diseases, such as SARS.
deal在句中可用作及物动词或不及物动词：
①用作不及物动词，常与with连用，意思是/"对付；处理/"。
He seemed to be quick-tempered,
but was actually not difficult to deal with. 他似乎性子急躁，但实际上并不难相处。
He knows how to deal with children. 他知道怎样对付孩子。
②用作及物动词，意思是/"分配；给予/"等。
I tried to deal justice to all men. 我力求公正地对待所有的人。
5. If we learn to accept change and appreciate what is new and different, we will be well-prepared for whatever the future may have in store.
appreciate用作动词，意思是/"鉴赏；欣赏；赏识；感谢/"等，常用于以下句型：
①appreciate + n.
I appreciate your goodness in calling. 你好心来看我，我很感激。
②appreciate + V-ing
We appreciate hearing from you
again. 我们乐于再次收到你的来信。
③appreciate it +if从句
I shall appreciate it if you will do me that favour. 若是你肯帮那个忙，我会非常感激的。