Foregut
n. 前肠
🗣️ 情景例句
Involve the entire family in a reading project.
让整个家庭都参与阅读计划。
To blow smoke rings
喷出烟圈
So the number of stars that we know exist is now estimated at about 300 million million million.
因此，我们所知道的现有恒星数目估计约有30亿×1000亿颗。