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...
In micrographics, a device that enlarges microimages for viewing.在缩微照相技术中, 放大图形以便观察的一种设备.She disapproved of her son's indiscriminate television viewing.她不赞成儿子不加选择地收看电视.After viewing this PNG , you notice them ( mill...