含盐度怎么用英文表达？

salt content

含盐度
salinity
salineness
珍珠的色泽受到作为其母体牡蛎种类及牡蛎生活水域的深度，温度和含盐度的制约。
The pigmentation of apearl is influenced by the type of oyster in which it develops and bythe depth， temperature， and the salt content of the water in which theoyster lives.