Some animals such as snails have one shell.

有些动物例如蜗牛有一个壳。

youdao

On the bridge, on one shell hit on or near it every five minutes.

大桥上，每五分钟就有一发炮弹击中或打在附近。

youdao

We learn nothing from examining what is going on down here in n equals one shell.

必须仔细检查不然我们学不到什么的,这里n=1的壳。

youdao

Whatever the n number is, with the exception of helium, helium is the oddity because there's only two elements in n equals one shell.

无论n是多少，除了氦之外，氦是个特例,因为只有两个元素,在n为1的这一层。

麻省理工公开课 - 固态化学导论课程节选

We learn nothing from examining what is going on down here in n equals one shell.

必须仔细检查不然我们学不到什么的,这里n=1的壳。

麻省理工公开课 - 固态化学导论课程节选

Whereas for fluorine, fluorine is smaller than f minus is the one that's the outer shell shown here.

而对于氟来说，氟原子更小,与外部壳层在这的负一价氟离子相比。

麻省理工公开课 - 化学原理课程节选

At one Shell station near Houston's huge medical center, there were no cars in the driveway.

NPR: Gas Shortages Stalled Houston Evacuation

One shell whistled above us and smashed into an orchard perhaps 100m away.

BBC: Libya: Misrata's terrifying routine

One shell fired in the morning had landed more than 1, 500ft (450m) from its target in the morning, hitting compound eight, but no-one was injured.

BBC: Swanley soldier 'killed by smoke shell'