If you want knowledge, you must toil for it.
要想求知，就得吃苦。
He is not fit to command others that cannot command himself.
正人先正己。
Spam filters can remove a lot of unwanted advertising.
垃圾邮件过滤器可以移除那些讨厌的广告。
I can do nothing except go swimming in the dog days of summer.
在三伏天里，除了游泳，我什么事也做不成。
Where there are difficulties, there are ways to get over them.
哪儿有困难，哪儿就有解决问题的办法
July 9 will be their swan song.
7月9日他们将举行告别演出。
As for colds, the sooner a person starts taking over-the-counter remedies, the sooner relief will come.
患者越早开始服用非处方药，感冒就好得越快。
Marketing is the process by which companies create customer interest in products or services.
营销是一个过程，公司通过营销吸引客户对其产品或服务的兴趣。