Hef
abbr. 高能成形（High-Energy Forming）；人胚纤维母细胞
🗣️ 情景例句
I don't know. The baby-sitter says she has a stomachache,
我不知道。临时保姆说她肚子疼.
Don't cross the bridge till you get to it.
不要杞人忧天。
He did everything very slowly.
他做什么都很慢。