Staged vehicle
多级火箭
🧩 词语组成解析
a. 分期的
🗣️ 情景例句
Just to have as a pet.
只是要养来当宠物。
It must be rather difficult for us to push any sales if we buy it at this price.
如果我们按这个价格购买，将很能难推销。
We continually wage war on them, for they contaminate our food, carry diseases, or devour our crops.
人类不断同昆虫斗争，因为昆虫弄脏我们的食物，传播疾病，吞噬庄稼。