Ulcerative ulitis
[医] 溃疡性龈炎
🧩 词语组成解析
a. (使)形成溃疡, (使)溃烂, (使)腐败\\n[医] 溃疡的, 溃疡性的
龈炎
🗣️ 情景例句
Please sit down, Mr. Mark.
请坐吧，马克先生。
Knowledge is a treasure, but practice is the key to it.
知识是一座宝库，实践是打开宝库的钥匙。
it takes much less energy to accelerate to that 1.5 miles per second than it does on Earth.
在月球上加速到每秒1。5英里比在地球上所用能源要少得多。