因此，双桅帆船使用三面主要的帆：与单桅帆船一致的主帆，前帆，以及尾桅帆。

A ketch therefore USES three primary sails: the mainsail and head sail, as on a sloop, plus the mizzen sail aft.

youdao

而另一方面，首先出现喙形结构和最早尾综骨(用于支持羽毛的融合尾椎骨)的孔子鸟与现代鸟类之间几乎不存在什么不一样的地方。

On the other hand, Confuciusornis, which possessed the first beak and earliest pygostyle, or fused tail vertebrae that supported feathers, truly looks like a bird.

youdao

吉儿：没啥大不了的。我通常会跟他们讲怎么走到街尾那家义大利面餐厅。

Jill: It's okay, I usually tell them how to get to the pasta restaurant down the street.

youdao