Hard tube
[电] 硬性电子管
🧩 词语组成解析
hard
[hɑrd]
adj. 困难的;硬的;有力的;努力的;
adv. 努力地;猛力地;严重地;沉重地;
n. 英〉硬海滩，登陆处;
🗣️ 情景例句
Please drive carefully.
请小心开车。
You have to be there half an hour before departure time.
你要在起飞前半小时到那里。
The house was dirty. They hadn't cleaned it for weeks.
房子很脏，他们好几个星期没打扫了。