Bidirrectional transistor
[电] 双向电晶体
🧩 词语组成解析
🗣️ 情景例句
Hi, Alexandra.
嗨，Alexandra。
There is a tremendous responsibility involved in raising children.
养育孩子是一桩责任重大的事情。
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。