Periodic system of elements
[化] 元素周期系\\n[医] [门捷列夫]元素周期系
🧩 词语组成解析
periodic
[,pɪrɪ'ɑdɪk]
adj. 周期的;定期的;回归的;间歇的，时而发生的;
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
n. 原理, 基础
🗣️ 情景例句
Then why don't we go look at this house, too?
那我们何不也去看看这栋房子？
He likes playing the harmonica.
他喜欢吹口琴。
Almost any day a young porpoise may be seen trying to turn a 300-pound sea turtle over by sticking his snout under the edge of his shell and pushing up for dear life.
几乎每天都可以看到一只小海豚把鼻子顶入一只300磅重的海龟的硬壳下面，拼命地把它翻过来。