He'd never been in a class before and he was not even sure that he should have been teaching.

他以前从未教过课，甚至不确定自己该不该教课。

The president has never been sure which direction he wanted to go in on this issue.

总统一直都不确定自己想从哪个方面来着手处理该问题。

She was no longer sure how she felt about him.

她不再确定自己对他的感觉。

It is impossible to be sure about the value of land. [+ about]

土地的价值是无法确定的。

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

许多人认为最好是接受付费教育，这样能确保教学质量。

It is the self-assurance of the new generation which makes them sure of their success.

年轻一代的自信让他们对成功志在必得。

With over 80 beaches to choose from, you are sure to find a place to lay your towel.

有 80 多个海滩可供选择，你一定能找到一处满意的。

Anyone who goes food shopping without a list is sure to forget the things they really need.

任何人如果采购食物时没列清单的话，肯定会忘了真正需要的东西。

Sharpe's leg and shoulder began to ache, a sure sign of rain.

夏普的腿和肩膀开始疼痛，这预示着肯定要下雨了。

She has a sure grasp of social issues such as literacy, poverty and child care.

她对扫盲、贫穷和儿童保育等社会问题都有深切的认识。

Be sure to read about how mozzarella is made, on page 65.

务必看看莫泽雷勒干酪是怎么制成的，在第 65 页。

Be sure you get your daily quota of calcium.

要确保每天的钙摄入量。

'He rang you?' — 'Sure. Last night.'.

“他给你打电话了？”—“没错。昨天晚上打的。”

'I'd like to be alone, O.K?' — 'Sure. O.K.'.

“我想一个人呆会儿，好吗？”—“好的，没问题。”

'We'll phone and you can make an appointment.' —'Sure. What time do you want to go?'

“我们会再打电话，你可以安排约见。”—“没问题。你们想什么时间去？”

'Has the whole world just gone crazy?' — 'Sure looks that way, doesn't it.'

“整个世界难道都疯了吗？”—“看上去的确如此，不是吗。”

It sure is hot, he thought.

天的确太热了，他想。

We found the English treacle pudding too good to resist. Sure enough, it was delicious.

我们觉得英国糖蜜布丁太好吃了，令人无法抗拒。的确非常美味。

I was in a shop when I saw a lady looking carefully at me. She'd recognised me, and sure enough, she came across.

我正在逛商店，突然看到一位女士在仔细地打量我。她认出了我，果不其然，她走了过来。

One thing's for sure, Astbury's vocal style hasn't changed much over the years.

有一点可以肯定，阿斯特伯里的演唱风格多年来没怎么改变。

Even to this day we don't know what happened for sure.

即使到现在我们也不确定究竟发生了什么。

Make sure that you follow the instructions carefully.

一定要认真按照操作指南来做。

He wants to make sure that schools are committed to providing alternative education.

他想确保学校尽力提供新型教育。

He looked in the bathroom to make sure that he was alone.

他往浴室里看了看，确定就他一个人。

Before you cut the cloth, make sure that the pattern matches up on both edges.

在裁剪布料前要确保两个边缘的图案对称。

This proposal is by no means a sure thing.

这个提议绝不会理所当然地获得通过。

'Be careful!' — 'Sure thing, Dad. So long.'

“要多加小心!”—“一定会的，爸爸。再见。”

Parents make the rules. To be sure, many of the rules are no longer appropriate today.

规矩由父母立下。诚然，其中有许多放在今天已不再合适了。

I'd never seen him like this, so sure of himself, so in command.

我从来没见他如此自信满满、指挥自若。