Prototoxin
强亲和(力)毒素
🗣️ 情景例句
ready for the graduation ceremony,
为毕业典礼做准备，
Is this book his?
这本书是他的吗？
We were, however, worried about our nearest neighbors, whose farm was low lying and who were newcomers to the district.
不过，我们很为我们的近邻担心。他们的农场地势低洼，而且他们又新来乍到。