大自然最让人惊叹的是它的无限多样性。The most amazing thing about nature is its infinite variety.它的发电成本要比核电站低。It will produce electricity more cheaply than a nuclear plant.发现问题后，如何克服它的问题又出现了。Having identified the problem, the question aris...
这种疼痛是由于血管的收缩而引起的。The pain is produced by constriction of the blood vessels.血管的突然破裂往往会造成外伤的痕迹.The rupture of a blood vessel usually cause the mark of a bruise.血管的排列有无数的变异.There are innumerable variations in the arrangemen...
他又发出一声凄惨的呜咽。He made another pathetic whimpering sound.多么凄惨的景象!What a sad scene!我的生日是家里全年最凄惨的一天.My birthday was the melancholy day at home, in the whole year....