1. When the Mutambaras’ first son was a about 18 months old they began to worry about his hearing.

worry about 担心

You needn't worry about money ─ I'll see you right.

你不必担心钱的问题——我会给你的E]@5.w,W2(。

2. This time a doctor referred them to Hearing Impairment Genetics Studies in Africa (HI-GENES), set up in 2018 by Ambroise Wonkam

set up 建立

A working party has been set up to look into the problem.

已成立一个工作小组来调查这个问题^ZCrHe~pPv。

3. The 3bn pairs of nucleotide bases that make up human DNA were first fully mapped in 2003 by the Human Genome Project.

make up 构成

North Africans make up the largest and poorest immigrant group in the country.

北非人构成了该国最大的、也是最贫困的移民群E^u5w.9Y5NQ&RQjPtlE。