Opsopyrrole
[化] 3-甲基-4-乙基吡咯
🗣️ 情景例句
with one real intergenerational program.
用一套真正跨辈份的活动。
Buck up, Billy, Enjoy yourself.
振作起来，比利，快快活活地过日子。
This is done by a great number of ring-shaped air jets on the bottom of the craft.
船底装上大量环状喷气嘴以实现这一目的。