compelled signalling强制发信号;[自] 互控信令
being compelled被强制
Compelled position被迫卧位
be compelled受外界迫使
compelled provision强制性条文
compelled edge不可反向边
compelled signaling互控信号方式;互控信令
Muhifrequency Compelled如多频记发器
V-T（及物动词） If a situation, a rule, or a person compels you to do something, they force you to do it. 迫使
...the introduction of legislation to compel cyclists to wear a helmet.
…强制骑车人戴头盔的法律的引入。
PHRASE（习语） If you feel compelled to do something, you feel that you must do it, because it is the right thing to do. 感到必须 (做某事)
Dickens felt compelled to return to the stage for a final goodbye.
狄更斯感到必须返回舞台作最后的告别。