Face a challenge, we should have corresponding the deala situation measure and be on guard mechanism.

You should be on guard when a stranger stands in front of your door.

当陌生人站在你家门前时,你应该有所提防.

Also she is no on guard of many things. Before she is quite silly, very lovely.

而且她现在对很多东西的戒备心很强,不像以前傻傻的, 很可爱.

The soldiers are on guard.

战士们在站岗.

The rooms were cruelly dismal with their walls on guard like policemen.

教室里,四面墙壁像警察一样看守着我们,特别地沉闷.

Two soldiers are on guard gate.

两名战士在门口站岗.

The iron gate was closed fast and four policemen stood on guard.

铁门是关得紧紧的了,两对警察是门岗.

The sentry is on guard.

那哨兵在担任警戒.

Against that dreadful design the Church stands ever on guard.

对于这个可怕的计谋,教会是时刻提防的.

Everyone must be on guard against scams , but seniors can sometimes be vulnerable to fraud.

每个人都应该对诈骗提高警觉 ﹐ 但是老年人有时候特别容易上当受骗.

Test results-and therefore tests-are not required unless the company has them on hand.

检验结果并不要求必须上交,如果公司有准备好的也可以上交.

Please be on hand at 12 sharp.

请在十二点整到这里来.

He should be on hand to direct operations personally.

他应该亲自到场指挥.

I always like to keep a certain amount of money on hand.

我总喜欢在手头备好一笔钱.

All the residents and storekeepers in the neighborhood were on hand.

邻近的居民和店主们全都闻声赶来.

I reckoned I wouldn't stay on hand till he got that chance.

我算计着我决不会老呆在他身边,让他有机会来那一手.

Our team of experts will be on hand to offer help and advice between 12 noon and 7pm daily.

每天中午12点到下午7点，我们的专家小组将随时提供帮助和建议。

He put on high airs with his learning.

他以饱学而自傲.

Orders had come from on high that extra care was to be taken during this week.

上面下了命令，本周要格外小心。

Conclusion High-quality wave spectrum depends on high uniformity of magnetic field.

结论 获得高质量 的波谱,需要较高的磁场均匀度.

On high the great white clouds slid swiftly.

大片的白云在高空飘过.