Furiously he tested the spark - plugs, stared at the commutator.他氣呼呼地測試著火花塞, 眼睛盯著轉換器.The two ends of the wire are connected to a split - ring commutator.導線的兩端聯(lián)接到裂環(huán)整流器.Commutator and brushes shall be free of grease, or ot...
Marketers are still figuring out what makes them tick.市場商人仍然正在理解什么使他們畫勾號.Effective online marketers do not merely transfer hard - copy ads to cyberspace.講求實效的網絡營銷者們絕不是簡單地把平面廣告抄送到網頁上.But celebrity endorsements remain an i...