The ribosome finds the appropriate amino acid for each "letter" and assembles them head-to-tail in sequence; other "letters" indicate when to start and when to stop.

核糖体找到每个“字母”的适当的氨基酸，并将它们首尾相连，组成一个序列；其他“字母”表示何时开始以及何时停止。

youdao

We'd assumed we'd have to give it a moving head and tail, facial features, and put a scene on it to make it smell like a real rat, but that wasn't necessary.

我们认为我们必须给它一个移动的头和尾巴，面部特征，并给它一个场景，使它闻起来像一只真正的老鼠，但这是不必要的。

youdao

A kipper is a whole herring fish that has been split from tail to head, salted, and smoked.

腌鱼是整条鲱鱼去头去尾后以盐腌制而后烟熏而成。

youdao

He displayed his discovery at the Philadelphia Academy of Sciences and showed it off to colleagues, including Othniel Marsh--who retorted that the head of his so-called elasmosaurus was firmly affixed to its tail.

FORBES: Magazine Article

But after a lifeboat rescue, the endearing creature - which looks like a giant head, and has a parrot-like beak, no tail and two giant dorsal fins - is settling down to life at the Blue Planet Aquarium in Ellesmere Port, Cheshire.

BBC: News | Wales | Sea urchins may have committed suicide