例句與造句

1. In this thesis , the model of launch dynamics is researched . it consists of ship - based launch and ground - based launch
   本文對導(dǎo)彈發(fā)射動力學(xué)進(jìn)行了研究，主要分兩大部分，艦載發(fā)射和地面發(fā)射。
2. It's difficult to find ground-based launch in a sentence. 用ground-based launch造句挺難的