The dancers are birds of passage. Every year they go on a world tour.

Woodcocks are birds of passage, here today and gone tomorrow.

山鹬是一种候鸟, 今天在这里,明天在那里.

Mohammed Dawwas says the bombings have taken a toll on the people of Gaza.

达瓦斯说,以色列的轰炸给加沙人带来损失.

Newspaper headlines echo the gloom with reports of bombings and shoot-outs.

新闻头条上有关轰炸和枪战的报导也加重了这阴郁的气氛.

The shootings and bombings were "a scandal and reproach to all of us in Europe".

这些枪杀和轰炸事件是“我们所有欧洲人的丑闻和耻辱”。

The stunning photographs were taken by marine biologists at Plymouth University.

这些让人目瞪口呆的照片是由普利茅斯大学海底生物学家拍摄的.

But synthetic biologists themselves are aware of the risks.

然而合成生物学家们已经意识到了这些风险.

Molecular biologists, however, reckoned 5 m years a better estimate.

然而分子生物学家则认为500万年前比较确切.

Biologists are looking into the structure of the molecules that comprise our genes.

生物学家正在寻找构成我们基因的那些分子的结构.

Some biologists have suggested the " founders theory " as a solution to the puzzle.

有些物理学家已提出所谓 “ 定居者理论 ” 作为对这个疑谜的解说.

For these reasons, many evolutionary biologists and paleontologists wonder if there is more to the story.

正因为这个缘故, 不少拥护进化论的生物学家和古生物学家怀疑其中是否另有文章.

Now, molecular biologists have a technique that permits them to put together genes from different organisms.

目前, 分子生物学家已有一种技术使他们能把来自不同有机体的基因联在一起.

Biologists now wonder how many traits of living and fossil organisms have evolved in this way.

生物学家目前正在捉摸,在现有生物和过去生物的各种特征中有多少特征是由上面所说的这种方式演变而来的.

These days, molecular biologists are anything but smug.

现在, 分子生物学家们是无论如何也不安于现状了.

This word added zest to a new group of biologists.

这一词使一大批生物界后起之秀兴趣倍增.

No longer can biologists be content simply to study morphology.

生物学家不再满足于简单地研究形态学.

This is one form of a process that biologists call genetic drift.

这是生物学家称之为遗传偏移的一种方式.

Biologists need to compare xerophyte and hydrophyte

生物学家需要对比旱生植物和水生植物。

The two biologists found, to their surprise, that both groups of birds survived equally well.

这两位生物学家惊奇地发现，两组鸟都很好地存活了下来。

This substance has now been cloned by molecular biologists.

该物质现在已被分子生物学家克隆。

This reset their body clocks as if they'd taken a six-hour plane trip to the east.

这样可以模拟出向东飞行6小时,机体生物钟的调整状况.