growth of silkworm

• 蚕的生长

growth of silkworm的用法和样例：

例句

1. Ragworm jaws are made of a mixture of protein and zinc ions.
   沙蚕的颌齿是由蛋白质跟锌离子结合而成。
2. The increment of saccharinity of leaves is useful for silkworm development and increasing eggs-laying.
   提高桑叶舌糖量有利于蚕的发育和增加产卵量。