翻译：
在过去的近几年内,我们见证了为了发展,以宽禁带半导体氮化镓和其相关合金和异质为基础的,各种电子设备的深入研究活动.
请问这句话怎么翻译好?尤其是“we have witnessed.”该怎么翻译?
请问这句话怎么翻译好?尤其是“we have witnessed.”该怎么翻译?
In the past few years we have witnessed intensive research activity in the development ofa variety of electronic devices based on the wide band gap refractory semiconductor GaN, and its related alloys and heterostructures.
In the past few years we have witnessed intensive research activity in the development ofa variety of electronic devices based on the wide band gap refractory semiconductor GaN, and its related alloys and heterostructures.
英语人气：755 ℃时间：2020-04-14 05:57:43
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