to stop someone from speaking or expressing themselves
阻止某人说话或表达自己 (zǔzhǐ mǒurén shuōhuà huò biǎodá zìjǐ)
"He tried to shut her down whenever she disagreed."
"每当她不同意时，他总是试图让她闭嘴。" (měi dāng tā bù tóngyì shí, tā zǒng shì shìtú **ràng tā bìzuǐ**.)
to reduce pollution caused by transportation
to stop or reduce pollution sources
to allow emotions to calm down naturally over time
to publicly support or agree with something
to gather support for a person or cause
to behave badly or cause trouble
