Tpf
[医][=thymocyte proliferation factor]胸腺细胞增生因子
🗣️ 情景例句
do I really have to
我是不是真的有必要
I often read the newspaper in the morning.
我常常在早上看报。
Jim, could you help me, please?
吉姆，你能帮我吗？