1. When the Mutambaras’ first son was a about 18 months old they began to worry about his hearing.
worry about 擔心
You needn't worry about money ─ I'll see you right.
你不必擔心錢的問題——我會給你的
。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.
已成立一個工作小組來調查這個問題
。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 構成
North Africans make up the largest and poorest immigrant group in the country.
北非人構成了該國最大的、也是最貧困的移民群
。