On many farms the traditional 4 - year growth cycle has been reduced to as little as six months 在一些养殖场，珠蚌传统的4年生长期被缩短为6个月。
2.
Not only then are the smaller , less robust creatures but the pollution in the water changes the color of the nacre and changes the color of the pearl 珠蚌不但更小，生命力更弱，受到污染的水会改变真珠质和珍珠的颜色。
3.
Much to our surprise when the plankton entered the oyster tried very hard to expel the plankton . within3 - 5 minutes , the movement of the heart became very abnormal and the oyster died at once 意想不到的是当浮游生物进入蚌体时，珠蚌的排异性非常强， 3到5分钟之内，蚌的心脏运动异常并很快死亡。
