youdao

The town has only one primary school.

这个镇只有一所小学。

youdao

Waiter, this lobster has only one claw.

服务员，这个龙虾只有一只爪。

youdao

But the researchers did much of their work with a phureja, a kind of a potato that has only one copy.

VOA: special.2009.10.20

We were talking about methane, which has only one central atom.

我们讨论的甲烷，只有一个中心原子。

麻省理工公开课 - 化学原理课程节选

s -- we don't have to hybridize it, it already has only one unpaired electron in a 1 s orbital.

s-我们不用杂化它，它已经有而且仅有一个未配对电子在s轨道里。

麻省理工公开课 - 化学原理课程节选

The constitutional role of the guard has only one military function, that's to repel invasion.

NPR: Critics Question Using Nat'l Guard Troops at the Border

Now, the United States has only one government and one president at a time.

NPR: Can The Global Crisis Wait For A New President?

That turns out to be especially true since the mall in question has only one customer.

WSJ: Michael Urie superb in charming 'Buyer & Cellar'