Life has no rehearsals, only performances.
人生是没有彩排的，是只有一次的演出。
There were half as many again as there were last time.
只有上次一倍半的量。
THIS KIND OF CERTAINTY COMES BUT ONCE IN A LIFETIME.
这样确定无疑的爱,一生只有一次.
We had only one check to our pleasure
我们的快乐里，只有一次小小的波澜。
However, it was my only experience to boast about in my childhood.
在我的童年中，也就只有过这么一次。
During the month of May there was only one further occasion on which they actually succeeded in making love.
五月里，他们只有一次真的做了爱。
The compensation paid for such a trip was only twenty-five cents.
这样开一次车的报酬只有２毛５分钱。
I only regret that I have But one life to give for my country
我抱憾的是,只有一次生命能献给祖国
Only once did his wife give way to emotion
他的妻子只有一次情不自禁地哭起来。
The goods will is accept only if the result from the two inspection is identical with each other.
只有两次检验的结果一致时才能收货。
Li:Life is valuable. But life belongs to us only once.
黎：生命是可贵的，我们只拥有一次。
and only on one occasion have I ever felt frightened.
只是有一次把我吓坏了。
For once he was telling the truth.
他只有这一次说了实话。
The practice or condition of having only one wife at a time.
一妻制一次只有一个妻子的做法或状态
Once he crawled upon one that must have been asleep.
有一次，他爬到了一定是睡着了的一只松鸡旁边。
Vacations were staggered so that only one person was away at a time.
休假是错开的，为的是一次只有一个人不上班。
He is usually well-behaved;this rudeness is only a lapse.
他一向彬彬有礼,这次的无礼只是一时的失态。
I only regret that I have but one live to give for my country. --Coleridge
我唯一遗憾的是，只有一次生命献给祖国。——哈尔