Unidirectional pulses
[電] 單向脈沖
?? 詞語組成解析
unidirectional
[,ju:nidi'rek??n?l]
adj. 單向的，單向性的;
n. 脈搏( pulse的名詞復數(shù) ); [無線電]（電磁波等）脈動; 活力; 有節(jié)奏的跳動（或拍打）
??? 情景例句
and he doesn't get to use it.
卻又用不上。
To blow smoke rings
噴出煙圈
She was in the city to visit her daughter.
她住在農(nóng)村。