我见过蜜凯拉一次，时间很短。
She once ruled over a vast empire.
她曾统治过一个幅员辽阔的帝国。
他曾在赞比亚生活过。
Ann turned over in her bed once more.
安在床上又翻了一次身。
She once allowed me into her inner sanctum.
有一次她让我进入她的内室。
Once destroyed, brain cells do not regenerate.
脑细胞一旦遭到破坏，就不能再生。
I enjoyed school enormously once I'd settled in.
一旦适应了，我就非常喜欢上学了。
We once watched a red fox attacking a groundhog.
我们曾看见一只红狐攻击一只土拨鼠。
She only sees her parents once every six months.
她每半年才探望一次父母。
She paid me in dribs and drabs, not all at once.
她一点一点地付给我钱，而不是一次付清。
Once there were 70 million buffalo on the plains.
在这片平原上曾经生活着7000万头水牛。
Lung cells die and are replaced about once a week.
肺细胞约每周死亡、更新一次。
Once the dust had settled Beck defended his decision.
一旦尘埃落定，贝克就为自己的决定进行了辩护。
Once, years ago, he told me our lives should entwine.
多年前他曾跟我说，我们的生命应该交织在一起。
The Public Utilities Commission inspects us once a year.
公用设施委员会每年到我们这里视察一次。
Once its impurities had settled, the oil could be graded.
一旦杂质沉淀下去，油就可以定级了。
Chefs at the restaurant once cooked for President Kennedy.
这家饭店的厨师曾经给肯尼迪总统做过饭。
Attempts to resurrect the ceasefire have already failed once.
为恢复停战所作的努力已经失败过一次了。
Once our services cease to be useful to them, we're expendable.
一旦我们的服务对他们没了用，我们就是可消耗的了。
She'd mentioned it casually once, surprising him by her unconcern.
她随意地提过一次这个事，她的漠不关心让他吃惊。
Once Bob stormed drunkenly into her house and smashed some chairs.
有一次，鲍勃醉醺醺地冲进她的房间，砸坏了几把椅子。
The newspapers once again filled their columns with salacious details.
这份报纸又一次用诲淫的细节填满了版面。
The lion roared once and sprang.
狮子吼了一声，跳了起来。
The lion roared once, and sprang.
狮子吼了一声，跳了起来。
Discussions have once again stalled.
讨论再次停顿下来。
Umpteen of them all arrived at once.
他们大伙都一块儿来了。
You can't be doing two things at once.
你不能同时做两件事。
The receptionist recognized him at once.
那名接待员马上认出了他。
I underwent an operation on my groin once.
我的腹股沟部位曾动过一次手术。
I underwent an operation on my groin once.
我的腹股沟部位曾动过一次手术。
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