restrictions
n.
约束( restriction的名词复数 );
管制;
制约因素;
带限制性的条件（或规则）;
例句:
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Germany, however, insists on restrictions on the import of Polish coal.
但是德国坚持对进口波兰煤炭加以限制.
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He warned that lifting copyright restrictions could beggar the industry.
他警告说解除版权限制会使这个行业一贫如洗。
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But he said the restrictions would be very temporary.
来自VOA
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When combining fares, all rules and restrictions apply.
来自WSJ
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Many reduced fares are hedged around with restrictions.
很多优惠费率都带有限制条件。
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There are some restrictions, embargoes on the island.
来自VOA