Undertamping
夯实不足
🗣️ 情景例句
Where there's smoke, there's fire.
事出必有因，无风不起浪。
Health and cheerfulness mutually beget each other.
健康愉快，相生相成。
This decline in vigour with the passing of time is called ageing.
生命力随时间的流失而衰退叫做衰老。