眼疲劳可不是个玩笑.Eye strain is no joke.?为了减轻眼疲劳, 我们将在公司的每一台计算机上都安装防辐射屏.To reduce eyestrain, we are going to install anti - glare screens on all of the company's computers.检查是否有眼疲劳.Check for eyestrain by putting your hand t...
另一种可能性是亲鸟会偏爱强壮的雏鸟。Another possibility is that parents favour chicks that are strong.那只蛋的壳厚0.14毫米，新孵出的雏鸟重9克。The egg had a shell thickness of 0.14mm and the newly-hatched chick weighed nine grams.雏鸟出壳后不久就不见了。The young disa...