Penny wise, pound foolish.

贪小便宜吃大亏。

Plain dealing is praised more than practiced.

正大光明者，说到的多，做到的少。

Please the eye and plague the heart.

贪图一时快活，必然留下隐祸。

Pleasure comes through toil.

苦尽甘来。

Pour water into a sieve.

竹篮子打水一场空。

Practice makes perfect.

熟能生巧。

Praise is not pudding.

恭维话不能当饭吃。

Praise makes good men better, and bad men worse.

好人越夸越好，坏人越夸越糟。

Prefer loss to unjust gain.

宁可吃亏，不贪便宜。

Prevention is better than cure.

预防胜于治疗。