Open your mouth and see your throat

can 't help laughing - yǎ rán shī xiào

Keep your mouth shut - bì kǒu bǔ shé

set the Thames a great coup - yī míng jīng rén

scratch the back while the knee is itching -- irrelevant - xī yǎng sāo bèi

Remove the hole with leather belt - gé dài yí kǒng

The dragon's war and the fish's horror - lóng zhàn yú hài

A silent watchman - chén fēng jìng tuò

wander without a fixed dwelling - píng piāo péng zhuàn

A gimmick - kě fā yī jué

make the enemy yield and the different nation submit to the authority - huái dí fù yuǎn