be careful；讀音：英 [bi: 'ke?fl] 美 [bi: 'ke?fl]；解釋：當(dāng)心, 注意；列句：；1.Be careful about what you say.；對(duì)你所說(shuō)的話要小心。

；2.You should be careful when making a promise.；你應(yīng)當(dāng)謹(jǐn)慎做出承諾。；3.Be careful!；一定要小心?。?.Be careful crossing the road.；過(guò)馬路要當(dāng)心。；5.Be careful of that viper; he is dangerous.；小心那個(gè)陰險(xiǎn)的人，他很危險(xiǎn)。；6.Be careful of that chair; it's a bit rocky.；當(dāng)心，那椅子有些不穩(wěn)。；7.Be careful when you cross the road.；過(guò)馬路時(shí)要當(dāng)心。；8.Be careful not to lose too much liquid by evaporation.；小心，不要因?yàn)檎舭l(fā)作用而失掉過(guò)多的水份。