他们一直努力学习 的翻译是:They have been trying to learn 中文...
a你誤解我的意思 You misunderstand my meaning [translate] aland safe 土地保险柜 [translate] a目前,大多数激光扫描仪主要采用第一种方法即TOF(Time of Flight)脉冲测距法, At present, the majority laser scanner mainly uses the first method is TOF (Time of Flight) the pulse range finding, [...