Monotractor
单轮驱动拖拉机
🗣️ 情景例句
Twenty-one inches.
二十一英尺。
Sadness and gladness succeed each other.
悲喜互继，哀乐相续。
if there is any effect of noise upon mental health it must be so small that present methods of psychiatric diagnosis cannot find it.
如果噪音对精神健康有影响的话，那也一定是微乎其微，以致现代的精神病诊断方法还发现不了。