常用英语短语
uncertain of /about 不确定
常用口语句子
They're both uncertain about what to do.
他们两人都拿不定主意该怎么办。
I'm still uncertain of my feelings for him.
我仍不能肯定我对他的感情。
He was uncertain of the meaning of the sentence.
他对那句子的意思不能确定。
常用英语短语
under control 处于控制之下
常用口语句子
You must get your spending under control.
你必须节制开支。
The fire has been brought under control.
火势已受到控制。
Don't worry； everything's under control.
别担心，一切都在控制之下。
常用英语短语
under the circumstances这种情况下
常用口语句子
Under the circumstances he felt unable to accept the job.
在这种情况下，他觉得无法接受这项工作。
She coped well in the circumstances.
她在这种情况下仍处理得当。
I wanted to leave quickly but under the circumstances I decided to stay another night.
我想很快就走，但在这种情况下，我决定再呆一个晚上。
常用英语短语
up and down 来回，上上下下
常用口语句子
The teacher was walking up and down inthe classroom.
老师在教室里走来走去。
She was jumping up and down.
她上上下下地蹦着。
Johnson looked her up and down and decided to ask her out.
约翰逊上上下下打量了她一番，决定邀请她出去。
常用英语短语
up front 提前付款，先期付款；开诚布公的，公开的，坦率的
常用口语句子
We'll pay you half up front and the other half when you've finished the job.
我们先付给你一半钱，剩下的一半等你干完了再付。
Some companies charge a fee up front； butwe don't think that's right.
有些公司预先收费，但我们认为那是不对的。
You can't help being biased so you may as well be up front about it.
你难免会有偏见，倒不如干脆坦然承认。
常用英语短语
up in the air 没有确定
常用口语句子
Our travel plans are still up in the air.
我们的旅行计划尚未决定。
The issue is still up in the air.
问题仍然悬而未决。
Plans for the picnic are still up in the airsince we can't decide where to go.
由于我们不能决定去哪儿，野餐计划还未定。
常用英语短语
up to date 在进行中，直到现在（的），直到最近（的）；最新式的
常用口语句子
I have not received news from him up todate.
直到如今我还没有接到他的消息。
The list is up to date now that we've added the new members' names.
我们把新成员的名字已经加进去了，这份名单是最全的了。
She wears clothes that are right up to date.
她穿着最时新的衣服。
常用英语短语
up to 多达；直到；胜任；取决于
常用口语句子
I can take up to four people in my car.
我的汽车最多能坐四个人。
Up to now he's been quiet.
他直到此刻仍保持沉默。
It's up to you.
这取决于你。
常用英语短语
upside down 颠倒
常用口语句子
The painting is upside down.
图画颠倒了。
He turned the glass upside down.
他将玻璃杯子倒置。
The children turned the house upside down.
孩子们把屋里弄得乱七八糟。
常用英语短语
used to 常常，经常，往往
常用口语句子
I used to go to the cinema every week.
我过去每周都去看电影。
I weigh less than I used to.
我的体重比以前轻了。
Are you used to the food here？
你习惯吃这儿的食物吗？
常用英语短语
vital to 对……关系重大
常用口语句子
This point is vital to my argument.
这一点对我的论据极为重要。
Quality is vital to an enterprise.
质量是企业的生命。
Air is vital to all creatures.
空气对所有的生物都极为重要。
常用英语短语
void of 没有，缺乏
常用口语句子
Her face was void of all interest.
她面部表情显得对什么都不感兴趣。
That subject is void of interest.
那个题目没有趣味。
Her face was void of expression.
她的脸毫无表情。