extent是指测试对不对

　　We are all to a great extent the products of our culture.

　　我们在很大程度上都是本土文化的产物。

　　The extent of the damage could not have been foreseen.

　　损害的程度是无法预见到的。

　　That's true, to a certain extent.

　　在一定程度上的确如此。

　　You can't see the full extent of the beach from here.

　　从这儿看不到海滩全貌。

　　The book discusses the extent to which family life has changed over the past 50 years.

　　本书论述了近50年来家庭生活的变化程度。