Ferroselenium
硒铁
🗣️ 情景例句
I'm very glad to meet you.
很高兴认识你。
Is there a pay pnone nearby?
这附近有没有公用电话？
We owe a lot to the birds and beasts who eat insects but all of them put together kill only a fraction of the number destroyed by spiders.
我们要十分感谢那些吃昆虫的鸟和兽，然而把它们所杀死的昆虫全部加在一起也只相当于蜘蛛所消灭的一小部分。