第058句

We are obliged to them because some of these languages have since vanished, as the peoples who spoke them died out or became assimilated and lost their native languages.

译文：我们很感激他们，因为在此之后，由于说这些语言的部族或是灭绝，或是被同化并丧失了自己的本族语言，这些语言中有一些已经消失了。

点睛：本句的主干为we are obliged to them+ because引导的原因状语从句，该原因状语从句中还包含由as引导的另一个原因状语从句。who引导的是以peoples为先行词的定语从句。短语be obliged( to sb.) for sth. /doing sth.意为“受恩惠而感激（某人）”。die out此处意为“灭绝，逐渐消失”。

考点归纳：与动词die相关的常见短语还有：

*die away慢慢变弱，渐渐消失
The strange noise died away.
那奇怪的噪音慢慢消失了。

*die down减弱，平息
Don’t worry; the gossip will soon die down.
别担心，流言不久就会平息的。

*die off相继死去
The plants in the garden died off.
花园里的植物相继死去。