这种物质聚合形成坚硬的塑料。The substance polymerizes to form a hard plastic.枯松枝生起的篝火给这次聚合增添了随和、友善的气氛.A fire of withered pine boughs added sociability to the gathering.酸酐类固化剂则要求加热以促进聚合反应.Anhydride - type curing agents require the appl...
当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.他们零星散居在安第斯山脉的高处。They live high ...
After a pause Alex said sharply: "I'm sorry if I've upset you"歇了一会儿后，亚历克斯毫不客气地说：“要是让你心烦了，那我很抱歉。”They would do well to pause and ponder upon their new responsibilities.人们最好还是停一停,好好地想一想自己所负的新责任.There was a pause ...