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- A very useful quantity is the half-time for the reaction. 一个很有用的量是反应的半衰期。
- Useful quantities have changed hands. 较大的数量已经转手。
- There was a long lag in forwarding mail to us. 转寄给我们的邮件晚了很久才拿到。
- Can you make us a special offer based on a quantity of ... ? 以。。。数量为基础，贵公司能给特价吗？
- In 1886 the electrolytic process was invented. In the same year it was discovered that aluminium can be obtained by electrolysis of aluminium oxide. Shortly after that aluminium began to be produced in actually useful quantities. 1886年，电解法发明了。同年，人们发现通过电解氧化铝可以生产铝。之后不久，铝才开始大量生产出来以供实际应用。
- Will you partake of a drink with us? 和我们一同喝一杯好吗？
- He cut off a bunch of grapes to entertain us. 他剪下一串葡萄招待我们。
- It irks us to wait for people who are late. 等候迟到的人使我们厌烦。
- She made us all laugh with her zany tricks. 她那些滑稽的恶作剧逗得我们都大笑起来。
- The bandits subject us to all sort of indignity. 强盗们对我们加以各种侮辱。
- Kindly send us two samples of each class quote for. 报价时，请对每一个等级的各寄两个样品。
- One of the fishing boats sank down astern of us. 有一艘渔船在我们后面沉没了。
- Each of the components is useful in its degree. 每一个元件都各有程度不同的用处。
- His years of study were useful in his job. 他多年的学习有助于他的工作。
- A part of this urgent task was allotted to us. 这项紧急任务的一部分分给了我们。
- She offered to help us of her own volition. 她自愿提出要帮助我们。
- It disheartened all of us that she had been dismissed. 她被解雇了，这使我们大家都很沮丧。
- It took us an entire week to finish painting the home. 它花去了我们整整一星期的时间才把房子粉刷好。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- He piloted us through the large factory. 他领我们参观了这个大工厂。
