A bizarre drone designed to take the hassle out of walking your dog is being advertised by an online retailer.一家线上零售商公布了一则广告，宣传一款可以老大人遛狗的奇特无人机。

A VACCINE that could deal a serious blow to seven in 10 lethal cancers has been developed by scientists.科学家研发出有一种疫苗，可有力地抗击70%的可怕癌症。

一、工件的加装方式机械加工时，必需使工件在机床或夹具中比较刀具及其工件成形运动占据某一准确方位，称作定位。

Chinese technology conglomerate LeEco said it plans to eliminate about 325 jobs in the US and sharply reduce research-and-development operations.国内科技集团乐视称之为，计划在...