单词:aluminium-alloy piston
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图片1 enemy n. 敌人,敌军 adj. 敌人的,敌方的 例句:After several fails the enemy was forced to retreat. 几经失败之后,敌军被迫后撤。 rival n. 竞争者 对手 v. 竞争,对抗 ,相匹敌 例句:After the national
Ocean Floor Reveals Past Climate Changes Time capsule Lamont research professor Maureen Raymo, the director of the Core Repository, slides open a long, narrow drawer from the cabinet. Like thousands of others here, the drawer contains a long, thin cy
This Internal Combustion Engine is 50% More Efficient 新型内燃机效率提高50% Internal combustion engines in cars may be on their way out, but experts agree it will take a few decades before electric-powered vehicles become dominant. Meanwhile
A group of senior students from Zhejiang University have successfully developed an air hand-washing device. 浙江大学的一队大四学生成功研制出了空气洗手装置。 The device utilizes an infrared ray induction system, which detects t