Viability of the virus appears very difficult to assess at the time of production.

The members in Fig . 1-45 have a neat fit at the time of assembly.

图1-45中的杆件在安装时已调整好.

The book has to be a snapshot of the situation at the time of writing.

本书在编写时只能是对这种情况的简要反应.

Prices are correct at the time of going to press, but may be changed.

付印前价目无误, 之后或有变化.

Only 2000 Olunchun people were left at the time of the liberation.

解放时只剩2000多鄂伦春族人了.

10 percent down and the balance at the time of shipment?

百分之十付现款,余额在装运时付清 吗 ?

The visitor can ponder over the boomerangs used by aborigines at the time of Cook.

来访者可以琢磨琢磨土著人在库克时期用的回飞镖.

He was sane at the time of the murder.

在凶杀案发生时他的神志是清醒的.

We check prices at the time of going to press.

我们会在付印的时候核对价格。

I ran up the stairs and saw Alison lying at the top.

我跑上楼梯，见艾莉森躺在那里。

The birds chirp merrily at the top of tree.

鸟儿在枝头欢快地啾啾鸣唱.

She drew up her horse at the top of the hill.

她在小山顶上突然把马勒住.

The children sang out at the top of their voices.

孩子们放声高歌.

Put your name in brackets at the top of each page.

把你的名字填在每页上端的括弧内.

Block out this unimportant detail at the top of your picture.

在底片上把图像上部的这个不重要的细节涂抹掉.

He suddenly cried out at the top of his voice.

他声嘶力竭地大叫.

She was standing at the top of the stairs.

她站在楼梯的顶端。

He arrived breathless at the top of the stairs.

他爬上楼梯顶时气喘吁吁的。

He stopped at the top of the stairs.

他在楼梯顶端停了下来。

He moved to the empty chair at the top of the table.

他挪到桌子另一端的空椅子上坐下。

A chill wind blew at the top of the hill.

山顶寒风呼啸。