Immunogen
n. 免疫原
🗣️ 情景例句
OK.
好。
I'm young.
我很年轻。
Even under a clear blue sky, the village looked forbidding, as all the houses were built of grey mud bricks.
农舍全用灰色的土坯建成，因此，即使在晴朗的蓝天底下，村庄看上去也会令人感到难以亲近。