Embryo sac
胚囊
🧩 词语组成解析
sac
[sæk]
n. （动植物组织中的）囊，液囊;
abbr. 缩写 = (US) Strategic Air Command 战略空军司令部。;
🗣️ 情景例句
Do you think we should take down the decorations?
你觉得我们应当取掉这些装饰品吗？
I'd like to travel first-class.
我要头等舱。
He wasn't dreaming, officer.I was telling him to drive slowly.
警官，他思想没有开小差。我刚才正告诉他开慢点。