Perioidic system
[机] 周期系
🧩 词语组成解析
🗣️ 情景例句
Tom, is that you?
汤姆，是你吗？
Poets are the unacknowledged legislators of the world.
诗人是世上没有得到承认的立法者。
Often the little words have meanings of their own.
这些小词常常都有自己本身的意思。