摘要： 摘自流利说 -Rain老师 首先感受一下 一个复杂句，你能快速分清句型结构嘛？ The temperature at which a solid changes into a liquid depends on the substances. 固体变成液体的温度取决于物质本身。 句型一：主语+系动词 阅读全文

摘要： Ignatius and the Princess IV Problem Description "OK, you are not too bad, em... But you can never pass the next test." feng5166 says."I will tell you 阅读全文