Most people with only one copy of the gene—"carriers"—survive and pass the gene to offspring.

大多数只有一个基因拷贝的人——“携带者”——能够存活下来并将基因传给后代。

youdao

Furthermore, the single copy of a founder mutation often confers a survival advantage on carriers.

此外，创始者突变的单一拷贝通常赋予携带者生存优势。

youdao

For decades,it was considered one of the top airlines in the world, and other carriers in Asia tried to copy its style and success.

VOA: standard.2010.02.01

Even if American freight carriers were to copy El Al, Israel's airline, and hold goods for a day for security checks, it would not greatly erode the advantages of air freight over other means of transport.

ECONOMIST: Can it ever again be business as usual?