Immunereaction
免疫反应
🗣️ 情景例句
Hi! What happened?
嗨 ！怎么回事？
I'll have to look. What do you want to for?
我得看一看。你要零钱干什么？
Fortunately, however, ancient men made tools of stone, especially flint,
然而， 幸运的是，远古人用石头制作了工具，特别是用燧石，