crt器件: device; parts of an apparatu ...的: 4次方是 The fourth power of 2 i ...進(jìn)步: advance; progress; improve; ...投影器件的進(jìn)步: advances in projection devices飛躍的進(jìn)步: see a big leaforward下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯