be sure of

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.

He likes to be sure of his bodily comforts.

他注重物质上的舒适.

Be sure of this and just wait on Him.

确信这一点,只要等候他.

You can always be sure of a warm welcome at my house.

您什么时候到我家来都会受到热情欢迎的.

Can I be sure of a profit if I invest?

我要是投资,肯定能获利 吗 ?

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.

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.

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.

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.

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 it; give me the ocular proof.

相信它; 给我可见的证据.

Be sure of hay till the end of May.

不到五月底,干草不可弃.

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。

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

测试帮助制造业者确定产品的质量.