Dithionite
连二亚硫酸盐
🗣️ 情景例句
It's 5:00 p.m. today.
今天下午5点整。
The petroleum region is centered largely in the north.
那里的石油区大部分集中在北部。
Make sure that all bottles are opened in your presence,
确保瓶子是当着你的面开启的，