中英成語俚語800對025：冰凍三尺，非一日之寒

　　中英成語俚語800對025：冰凍三尺，非一日之寒

　　冰凍三尺，非一日之寒

　　Ill habits gather by unseen degrees.

　　The tree falls not at the first stroke.

　　An oak is not felled at one stroke.

　　eg：Smoking caused the man lung cancer as ill habits gather by unseen degrees.