秤砣虽小压千斤

[成语]
chèng tuó suī xiǎo yā qiān jīn

[含义]
秤砣看来一小块却能压住千斤之重。比喻外表虽不引人注目，实际很起作用。

[来源]
明·吴承恩《西游记》三十一回：“俗语云：尿泡虽大无斤两，秤砣虽小压千斤。”


[英文]
Although the weight is small, it weighs a thousand pounds