你可以在烹饪之前先将海鲜解冻，但是如果你这样做的话，一定要尽快地把它煮熟。
You can thaw out the seafood before cooking it, but if you do this, make sure you cook it as quick as you can.
如果你想去上1点的课，你可以这样做，但是一定要和我的助教安排一下。
If you want to go to class at 1:00, you're welcome to do so, but please arrange it with my assistants.
限制一下看电视，使用计算机或玩游戏的时间，如果一定要玩，尽量玩一些交互式的游戏，这样可以让你活动活动。
Limit your time watching TV, using the computer, or playing video games - and when you do play, try interactive games that get you moving.
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.
如果一定要座椅的话，那就用高脚椅，这样，你就可以和站着的人保持眼神交流。
If seats are needed, use tall stools that create contact at standing eye level.
但是，失败的时候一定要继续向前走，莱斯布朗说过：“如果你倒下了，一定要脸朝上，因为这样你能向上看，也就可以重新站起来。”
However, when you fail, be sure to fail forward! Les Brown said, “If you fall down, try to fall on your back, because if you can look up, you can get up.”
如果你这样做，一定要提供搜索进程情况的反馈，以便用户知道该进程并没有停滞不前。
If you do this, be sure to provide feedback on the search's progress so users know that the process has not stalled.
但是如果你采用这样的膳食，那么一定要保证获取足够的蛋白质、钙质、铁和维生素。
Just be careful if you do follow this type of diet to ensure that you get enough protein, calcium, iron, and vitamins.
如果你打算这样做，一定要告诉观众，正是你将被发送和发生了什么他们提供的信息。
If you're going to do this, make sure you tell visitors exactly what you will be sending and what happens to the information they provide.
如果你一定要大声看电视、听收音机放音乐的话，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 neighbors, which will make you and them feel good.
一定要确定你经常在比赛的前一天休息你的球员们，如果你不这样做（他们在比赛的前一天训练）么将会影响到他们比赛时候的状态。
Make sure you always rest your players the day before a match, training them the day before the match will have an adverse effect on their matchday performance.
如果是这样，那你一定要注意你的直觉。
但是，如果你这样做，一定要住在有空调的房子。
But if you do, make sure you live in an air-conditioned house.
如果你一定要以为他对我真有感情，那么，她们这样做法，便是既不近人情，又荒谬绝伦，我也就更伤心了。
By supposing such an affection, you make every body acting unnaturally and wrong, and me most unhappy.
如果你答应发回的照片，请一定要记住这样做。
If you promise to send back photos, make sure you remember to do so.
如果是这样，你的目标一定要包括精通英语的所有技能。
If so, your goals must include proficiency in all skill areas.
如果我可以找到这些话，我一定要把它们说出来，这样我的舌头就不会打结，当我注视着你的眼睛，我们永不会说再见。
If I could find the words, I would speak them, Then I wouldn't be tongue-tied, When I looked into your eyes, We would never say goodbye.
如果这样做，一定要删除你不想要的产品，然后再安装新的。
If you do, be sure to remove the product you don't want before you install the new one.
如果这样做，一定要删除你不想要的产品，然后再安装新的。
If you do, be sure to remove the product you don't want before you install the new one.
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