Tripropellant
三元推进剂
🗣️ 情景例句
Do either of you have any reason
两位之中可有哪位因为某项原因
Will you sign with our contract at this price?
你能以这个价钱在合约上签字吗？
No one can plead ignorance of a subject any longer, for these are countless do-it-yourself publications.
由于出版了不计其数的教人自己动手做事的书报杂志，没有人再能说对某事一无所知。