Ringelmann chart
[医] 林格耳曼氏图(用以检查烟的浓度)
🧩 词语组成解析
🗣️ 情景例句
How many are there in your family?
你们家几口人？
Who keeps company with the wolf will learn to howl.
近朱者赤，近墨者黑。
Next Thursday evening.
下星期四晚上。