单词：HDPE Pipes
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This is me building a prototype for six hours straight. This is slave labor to my own project. 这是我正在做一个模型，足足花了6个小时。完全是苦力活。 This is what the DIY and maker movements really look like. 这就是所谓的
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英语常见表示地点的介词 一、in, outside, between, among (A) in在里面 She put her book in the desk. 她把书放进了书桌。 (B) outside在外面 What did you see outside the hall? 你在大厅外看见了什么？ (C) between在之间
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