但这一规定不包括婴儿食品，药物以及乘客接受安检后在机场商店购买的液体物品。

Exemptions can be made for baby food, medicine and items bought at duty-free shops beyond the security barrier.

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1919年，清华大学首次规定学生必须游泳，但后来由于学生人数过多，学校也没有足够的游泳池供学生学习游泳而放弃了这一规定。

Tsinghua University first made swimming a requirement in 1919 but later gave it up because the number of students became too large and there were not enough swimming pools in the school for them to learn swimming.

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但欧洲的体制弱点阻碍了这一规定的执行：对违反赤字限制的国家的制裁被赦免。

But Europe's institutional weaknesses deterred enforcement of this provision: sanctions on countries that breached deficit limits were waived.

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