要素essential;essential factor;crucial component;key element
涉及東北亞和平與安全的～都可以在共同聲明中找到。All key elements involving peace and security in Northeast Asia may be found in the joint statement./首相的第一～就是要敢于辭退部下。The first essential for a Prime Minister is to be a good butcher./～市場(chǎng)market for factors of production |