Bibliometer
吸水性能测定仪
🗣️ 情景例句
and remember the meaning of Thanksgiving.
来追忆一下感恩节的意义。
Day and night.
没日没夜。
At last firemen have put out a big forest fire in California.
消防队员们终于扑灭了加利福尼亚的一场森林大火。