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 ...
Their failures in this area have damaged their self-confidence and creditability.他们在这一领域的失败使他们的自信心和可信度受损。Delegates accused them of trying to evade responsibility for the failures of the past five years.代表们指责他们企图逃避过去5年中多次...
我们想跟孩子们一起制作硫酸铜晶体。We tried to grow some copper sulphate crystals with our children.这些薄薄的晶体传导了大部分的动力。These thin crystals transmit much of the power.那种酸在晶体表面蚀刻出一些小孔。The acid etched holes in the crystal surface....
This paper summarized classification, functions, varieties of colorant and factors affecting coloration of salmon and bulltrout.本文阐述了着色剂的分类及作用 、 着色剂种类的选择及影响鲑鳟鱼着色效果的因素....