Periodic chain
[机] 周期链
🧩 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;
chain
[tʃen]
n. 链子，链条;连锁，连续;拘束;连锁店或旅馆系列的事物;
vt. 用铁链锁住;监禁，束缚;
🗣️ 情景例句
She is a wonderful mother.
她是个了不起的母亲。
What time do you get up every day?
你每天什么时间起床？
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。