Testing helps manufacturers to be sure of a product's quality.

To succeed in something, you must be sure of yourself.

要想获得成功, 你必须有自信心.

Arriving on foot, he could be sure of taking his men unawares.

步行到达, 他确信会使手下的人大吃一惊.

Be sure of hay till the end of May.

不到五月底,干草不可弃.

The first thing to be sure of is whom science should serve.

首先要明确的是科学应该为谁服务.

Be sure of this and just wait on Him.

确信这一点,只要等候他.

Be sure of it; give me the ocular proof.

相信它; 给我可见的证据.

An amusing bit of copy would circulate until no one could be sure of its origin.

一则有趣的文字往往流传到谁都不知道它的出处.

As amusing bit of copy would circulate until no one could be sure of its origin.

一则有趣的文学往往流传到谁都不知道它的出处.

Can I be sure of a profit if I invest?

我要是投资,肯定能获利 吗 ?

Perhaps we can be sure of the facts before they arrive.

在他们到来以前,也许我们可以把情况弄弄清楚.

A lot of people think that it's better to pay for their education so that they can be sure of getting quality.

许多人认为最好是接受付费教育，这样能确保教学质量。

She looked over her shoulder to be sure of her footing.

她扭头看了看后面以确认自已是否站稳了.

Be sure to make him believe it.

务使他相信此事.

If you ever cometo Dalian, be sure to let us know.

(任何时候)你若到大连来, 务请通知我们一声.

Be sure to make it clear and concise and avoid long-windedness.

注意简明扼要,反对长篇大论.

Be sure to write and give me all the news.

务必写信告诉我所有的消息.

Be sure to do the sowing in good time.

确保适时播种.

Be sure to remind her to come back early.

一定要提醒她早点回来.

Be sure to dig the whole garden over before winter.

在冬季来临前要把园子好好地翻一下.

Get up steam, and you will be sure to succeed.

加把劲, 你一定会成功的.