Telling conservationists that we need to preserve the natural heritage really is preaching to the converted!
向自然资源保护论者宣讲需要保护自然界遗产的道理, 真是多此一举.
The sofa can be readily converted into a bed.
这张沙发可以很容易改成床.
Britain converted to a decimal currency system in 1971.
英国於1971年改行十进制货币体系.
