挑線凸輪 take up the thread of a conversation: 拾起話頭thread take-up: 導(dǎo)線器; 跳線器thread up: 上緊螺紋take in up: 翹起來take it up: 翹起來下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯