如果你记住这些,游泳是安全的。
如果你想参加比赛,建议你记住这些指南:首先,确保你的胃里几乎没有食物。
If you want to take part in the contest, it is a good idea to remember these guidelines: first, make sure your stomach is nearly empty of food.
如果你定期复习的话,你要花多长时间才能轻松记住这些材料?
How long may it take you to remember the material easily if you review it regularly?
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