经久: 1.(经过很长时间) prolonged2.(耐久) durable 短语和例子经久耐用 durable; able to stand wear and tear; durable service
坚定: 1.(稳定坚强) firm; staunch; steadfast 短语和例子坚定的步伐 firm strides; 坚定的立场 a firm stand; 坚定正确的政治方向 firm and correct political orientation; 坚定的意志 constancy of purpose; 他是个聪明而又意志坚定的人。 he was a man of
