Ulitis
龈炎
🗣️ 情景例句
Give him a call.
打个电话给他。
Early mistakes are the seeds of future trouble.
早期的错误可以酿成日后的麻烦。
Since that time, various types of hovercraft have appeared and taken up regular service.
从那以后，各种各样的气垫船出现了，并开始了定期航行服务。