Keep them at it; don't let them get lazy.

We all stopped dead and looked at it.

我们一下子全都停了下来看着它。

The dog kept close at heel as his master picked up his bag and hurried off.

主人拿起提包匆匆离去,狗儿紧跟在后面.

My shoes are down at heel; I must have them repaired.

我的鞋后跟磨破了, 得找人补一补.

John is always down-at-heel, but his sister is always neat.

约翰常常衣着不整, 他妹妹却很整洁.

You're always so down at heel ; are you really that poor?

你总是穿得 破破烂烂 的,你真是那么穷 吗 ?

His boots were patched down at heel.

他的靴子七拼八补,后跟已坐了下去.

These instances were cited at hazard.

这些例子是随便举出来的.

Our interests were at hazard.

我们的利益受到了威胁.

The answer he gave at hazard turned out to be correct.

他胡乱做出的答案竟然是对的.

Your entire life is at hazard unless you wear a helmet when you ride your motorcycle.

骑摩托车时要带头盔,否则你的生命会面临危险.

Something, such as money or cargo, at hazard in a risky enterprise.

在南美的一些风险投机中他损失了所有钱财.

He is at grips with civil architecture.

他在钻研民用建筑学.

We are at grips with the poverty in the country.

我们正在和乡村的贫困搏斗.

The teacher saw two boys at grips with each other in the classroom.

老师看见两个男孩在课室里扭作一团.

Cattle are at grass.

牛群在牧场上吃草.

Is Tom underground? " " No, he is at grass.

“汤姆下矿井了 吗 ? ” “ 不, 他在坑上面.”

Let him run at grass for a few days.

让他休息几天.

Let them run at grass for a few days.

让他们休息几天.

DO NOT ATTEMPT TO START THE ENGINE AT FULL THROTTLE AS THIS IS VERY DANGEROUS.

千万不可在节流阀到高速位置启动引擎,这是非常危险的.

Once running at full throttle it is expected to last for 60 hours.

达到最高速度后,预计还要持续60个小时.