They only have one room left: you'll have to double up with Peter.
他们只剩下一个房间，你只好与彼得合住了。
We'll have to double up on books; there aren't enough to go around.
因为书不够人手一册，我们只好合用了。
The carpet is too thick to double up.
地毯太厚，折不起来。
The carpet is too thick to double up.
这地毯太厚没法折叠。
This carpet is too thick to double up.
这地毯太厚，叠不起来。
Tom and Bill will double up in room 20.
汤姆和比尔住二十号房间。
Can you double up and get great right away?
您能否周里程翻一番，立即变得强大无比？
I had a difficult week. You can double up next week.
我这个星期有点紧，你可以下个星期收双倍的。
I shall have to double up the rug to put it in the cabinet.
我必须把地毯折起来才能收到柜里去。
If you can double up on seating and storage, all the better.
如果您可以更好的，增加座位和储存空间。
The gas pistons enable the bed to double up as a computer table.
气体活塞可以把床铺折叠起来成为一张电脑桌。
We shall have to double up the sheets to get them in the drawer.
我们得把这些被单折叠起来才能放进抽屉里。
We should try to double up the amount of intimacy we have in marriage.
我们应当努力让我们婚姻中的亲密之量翻倍。
Alternatively, most in-room televisions also double up as an alarm clock.
另外，大部分的房间电视，也应该设有闹铃功能。
But Mr. Young murmured, "Let's just double up tomorrow," and went back to sleep.
但是杨先生喃喃地说道，“让我们明天翻倍吧，”然后，继续睡觉了。
Because of the housing shortage many couples had to double up in one tiny apartment.
由于住房紧张，许多对夫妻只好挤在一栋小公寓里。
Do not take a double dose of this medication. Do not double up the dose to catch up.
而就文中所介绍的药物，应当是“切勿一次服用两倍剂量”。
You may not double up on Sagas, although Special Characters do not count towards this.
你不可以叠加传说，特殊人物不在此例。
She looked up, then did a double take when she saw my dress and makeup.
她抬起头，看见我的衣服和打扮露出不能置信的表情。
We are practically full up, but I will see. What do you want, a single room or a double one?
我们宾馆几乎满了，但是让我看看，你想要什么样的房间，单人间还是双人间？
M: We are practically full up, but I will see. What do you want, a single room or a double one?
M：我们宾馆几乎满了，但是让我看看，你想要什么样的房间，单人间还是双人间？
But most of the time we need to learn how to set up double integrals.
但在大多数情况下，我们需要了解怎样建立二重积分。
We've seen various formulas for how to set up the double integral.
我们已经学过，如何建立这种二重积分的公式。
Use geometry or you need to set up for double integral of a surface.
总之，就是用几何方法或是在曲面上建立二重积分。
One is setting up and evaluating double integrals.
一个是建立并计算二重积分。
So, the first topic will be setting up double integrals.
先来说说关于建立二重积分的事。
Because a surface is a two-dimensional object, that will end up being a double integral.
由于表面是二维的，所以结果是二重积分。
Because a surface is a two-dimensional object, that will end up being a double integral.
由于表面是二维的，所以结果是二重积分。
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