People usually draw the curtains once it gets dark.
天一黑，人们通常就会拉上窗帘。
It is known as the music room because once it was used for music lessons.
它被称为音乐室，因为它曾用来上音乐课。
Once it touched the installation, it would die.
一旦它碰到装置就会毙命。
After all, once it was gone, I could never get it back.
总的来说，我一旦失去，不能复得。
'But once it is mixed with cow's milk, I can't taste it.
但一旦它和牛奶混合在一起，就变的没法入口了。
Once it was found - and killed - they returned home.
一旦发现猎物，就会将其杀死并带回家中。
Once it has been allocated, its size will not be changeable.
一旦它被分配，它的大小不能被改变。
Once it is found in the table, you will have the password.
一旦在表中找到相同的内容，就等于知道了密码。
Once it became a burden, it needed to be hustled off the estate.
一旦它成为负担，它立刻会被出售。
But once it generates positive cash flow, the story can change.
但一旦产生正向现金流，情况就可能发生改变。
But once it is, I think you'll be very pleased with the result.
但是一旦实现，我想您将对这个结果非常满意。
Once it has cooled, brush away the salt and the mess will come with it.
等它变冷后，把盐刷去溢出物也跟着清理掉了。
Once it goes on sale, the operating system will be a "shipping" product.
它一旦待售，该操作系统将成为一种“上市”产品。
Success is measured by how high the ball bounces once it hits bottom.
用一只球落到底部再弹起的高度来测量成就的大小。
For once it is Mr Cameron, not Mr Clegg, who has the bigger headache.
这一次，头疼的不是克莱格，而是卡梅隆。
The trouble is once it went international, the troubles started coming in.
他说，问题在于一旦它走向世界，麻烦也就接踵而至了。
Once it was safely inside the euro, indeed, Greece relaxed its fiscal grip.
希安然加入欧元区后，确实放松了其财政控制。
Once it is set up correctly, the configuration should look similar to Figure 1.
正确设置之后，配置应该与图1类似。
Once it has dissolved, you can transform it into a powerful, self-enhancing belief.
一旦你把它瓦解掉，你就可以转变到另一种强大的，自信的信念。
Once it has cleared the database, the application builds the business model in memory.
当清理完数据库，程序在内存中创建业务模型。
This book was famous once, but nobody reads it today.
这本书曾名噪一时，但现在却无人问津。
It was once thought that lead could be transmuted into gold.
有人曾经认为铅可以变成黄金。
It was once thought that the sun travelled around the earth.
人们曾经认为太阳绕着地球转。
It was evident that she had once been a beauty.
很显然的，她曾经是个美人。
Doing it once was just about excusable — doing it twice was certainly not.
这种事干一次也许还可以原谅，干两次就绝对不能了。
It had once been the home of a wealthy nobleman.
这曾是一个有钱贵族的宅邸。
We'll only do it once— if at all.
我们就是干也只会干一次。
Once the container is full, it stays shut until you turn it clockwise.
该容器一旦满了就会保持关闭，直到你将其按顺时针方向旋转。
Once you have removed the virus it is safe to reconnect to the Internet.
病毒一清除，就可以安全地重新连接互联网。
这种事儿他仅仅干过一次。
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