drop a line造句 1. We often drop a line to each other. 2. I will drop a line to him tomorrow. 3. I must drop a line to my mother. 4. I must drop a line to your sister to thank her for helping us. 5. QQ is abrupt drop a line , remount is not ascended went up. 6. I must drop a line to my uncle to thank him for having us.英文造句little giantequivalent weightgray ironboot salepowder metallurgyintermingle withrefractory materialpacking densityspeaker systemtime limitssystem infoacadia national parknested loopbedroom suiteguaranteed qualitystatistical mechanicsnicotiana tabacumcellulose acetatepositive definite matrixdiamond dustAND symbolcyprinus carpiospread spectrumbertrand russellmooring lineoptical densitytransmission shaftcartesian coordinategraham greene