这把她的魂都吓飞了，如果你一定要知道的话。而且我也被吓坏了。
It scared the hell out of her, if you must know. And me, too.
如果你一定要抽烟，请选择吸烟区第一排的座位。
If you must have a cigarette, choose a seat in the first row of the smoking section.
如果你一定要油炸，一定要把食物放在厨房的纸上，翻动几次尽量把油吸干。
If you must deep fry, be sure to drain the food on kitchen paper, turning it a few times to drain off as much oil as possible.
躺在床的边沿，摇摇欲坠，如果你一定要的话，可以发火，但要躺在同一张床上。
Lie precariously at the edge of the mattress and fume if you must, but lie in the same bed.
如果你一定要呆在阳光下的话，就用你能买到的最有效的防晒霜。
If you must be in the sunlight, use the strongest sunscreen you can get.
如果你一定要去踢足球，至少要等到放学。
If you must go and play football, at least wait until school is over.
路易斯·阿姆斯特朗说过，如果你一定要问，你将永远都不会知道答案。
Louis Armstrong said, if you've got to ask, you'll never know the answer.
如果你一定要问，她可能没有。
如果你一定要知道的话，我感觉糟透了。
如果你一定要离开，那就悄悄地走。
但是如果你一定要偷，请偷去我的悲伤。
如果你一定要指正某人，不要参杂个人因素。
如果你一定要用内置闪光灯的话，至少注意下列技巧。
If you MUST use the built-in flash, at least follow these tips.
“如果你一定要，好的。”骑手看了一眼他的伙伴。
如果你一定要吃零食，每次吃完记得刷牙或者咀嚼无糖口香糖。
If you must snack, brush your teeth or chew sugarless gum afterward.
如果你一定要用的话，就调到低火刚刚加热就好，不要时间太长。
如果你一定要爱我，请不要为别的，仅仅是为爱的缘故。
If thou must love me, let it be for naught except for love 'sake only.
如果你一定要知道的话，今天晚上站在中间的那个人叫做李·普罗伯特。
Tonight's man in the middle is Lee Probert, if you must know.
如果你一定要在上班之前把作业交上去，那我现在就帮你看吧。
LL: I need to go to work ASAP, so I need to hand this in before I go.
不过，如果你一定要选择RAID，要认识到利弊和相应的计划。
Still, if you do opt for RAID, be aware of the pros and cons and plan accordingly.
如果你一定要告诉我你的见解，你的信仰，对此我亦有很多的疑惑。
If you must tell me your opinions, tell me what you believe in. I have plenty of doubts of my own.
如果你一定要让标签按照精确地方式显示，别指望浏览器的缺省行为；把你的需求在CSS中指定。
If you absolutely need a tag to be rendered in a precise way, do not count on the browser's default behavior; specify your needs in CSS.
你必须学会不要笑。如果你一定要笑的话，确保你不要像邻居家的母鸡一样尖声笑个不停。
You must learn not to laugh, and if you must laugh then see to it that you don't cackle like the neighbor's hen.
如果你一定要深度油炸，请在食物专用的吸油纸上把食物过多的油吸掉，并在纸上翻转食物，尽量把油吸干。
If you must deep fry then be sure to drain the food on kitchen paper, turning it a few times to drain off as much oil as possible.
如果你一定要用Facebook向老板求职，那就说些有趣的话，并用拼写检查工具检查一下拼写。
If you do Facebook the owner, have something interesting to say and use a spell check.
如果你一定要使用Objective c开发，那你一定要用游戏框架，在游戏编码上会容易很多。
If you do decide to develop in Objective c, it's well worth using a games framework to make coding the game easier.
如果你一定要大声看电视听收银放音乐的话，记得戴上耳机，别影响邻里，这样可以使双方都感到舒适。
If you need your TV, radio or music up loud, wearing headphones demonstrates altruism to your neighbours, which will make you and them feel good.
在期末考试中，是用不上两个参数，表示来处理平面的，但如果你一定要用，可以考虑，给定平面上的一个起点。
So, you won't need to know about parametric descriptions of planes on a final, but if you really wanted to, you would think of defining a point on a plane as starting from some given point.
在期末考试中，是用不上两个参数，表示来处理平面的，但如果你一定要用，可以考虑，给定平面上的一个起点。
So, you won't need to know about parametric descriptions of planes on a final, but if you really wanted to, you would think of defining a point on a plane as starting from some given point.
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