pearl shell meaning in English

珍珠母，夜光贝，珍珠贝。

Determination of amino acids in pearl shell by rp - hplc with opa pre - column derivatization
邻苯二甲醛柱前衍生反相高效液相色谱法测定珍珠母中氨基酸
Mad about keys on the keyboard increases the oxygen , then press the button to dive to the bottom of the sea , above and below key control direction key blanks from pearl shell mining
狂按键盘左右键加氧气，然后按下键下潜到海底，上下左右键控制方向，空格键从贝壳中采珍珠。