Hehadcompletedasuccessfuloverlandflightduringwhichhecoveredtwenty-sixmiles.是定语从句吗?看不懂,请高手帮下忙.

Question

He had completed a successful overland flight during which he covered twenty-six miles.
是定语从句吗?看不懂,请高手帮下忙.

Answer 1

A week before, he had completed a successful overland flight during which he covered twenty-six miles.
一个星期之前,他成功地完成了一次飞越26英里的陆上飞
which he covered twenty-six miles 是定语从句修饰overland flight
这句话来来自于新概念英文Lesson 20 Pioneer pilots飞行员的先驱