"speak volumes" in Chinese (Simplified)
充分说明说明很多
Definition
如果某事‘充分说明’，就是即使没有用语言也能清楚地表达很多信息。
Usage Notes (Chinese (Simplified))
常用于正式和非正式场合，形容行为、表情或情况传达了强烈的信息，而不是实际说话。强调非言语的表达。
Examples
Her smile speaks volumes about how happy she is.
她的微笑**充分说明**了她有多开心。
His silence speaks volumes.
他的沉默**说明很多**。
The empty room speaks volumes about the event's failure.
空荡荡的房间**充分说明**了活动的失败。
The look on his face speaks volumes—I knew immediately something was wrong.
他脸上的表情**充分说明**了——我立刻就知道有什么不对。
When she refused to answer, that really spoke volumes.
当她拒绝回答时，这已经**说明了一切**。
His generosity speaks volumes about his character.
他的慷慨**充分说明**了他的品格。