book 7 unit3 using language
③He reflected on his past mistakes.他反省了过去的错误。④Technology's impact on the past decade was reflected in the list.技术对过去十年的影响也在榜单中得到了体现。
知识拓展reflect on/upon思考；反省reflect sth. from sth.反射reflection n．反映；影像；思考I reflected on possible reasons for my failure.我仔细考虑导致我失败的原因。