Smoleless propellant
[化] 无烟推进剂
🧩 词语组成解析
propellant
[prə'pelənt]
adj. 推进的;
n. 推进物;
🗣️ 情景例句
Hi.
嗨！
He seems very serious, but in fact he has a delightful sense of humor.
他看上去很严肃，其实很诙谐。
In his twenties Frank used to make spare parts for aeroplanes.
20多岁的时候，弗兰克曾生产飞机零配件。