clampdown n对言行的限制或禁止
clampdown of import from overseas压缩海外进口
N-COUNT（可数名词） A clampdown is a sudden restriction on a particular activity by a government or other authority. 制裁 [journalism] [oft N 'on' n]
...a clampdown on the employment of illegal immigrants.
...对雇佣非法移民的一种制裁。