Helicism
螺旋式
🗣️ 情景例句
Hi, Alexandra. Come on in.
嗨， Alexandra 。请进。
Don't forget to print airmail on the letter.
不要忘记在信封上印上航空邮件
It did not take the firefighters long to put out the fire, and they at once started to look for causes of the fire.
消防队员没花多时间就把大火扑灭了，他们马上开始调查火灾发生的原因。