yolk duct

例句：

1. 1. The yolk duct is where the egg white and yolk mix together.
   卵黄管是蛋黄和蛋白混合的地方。
2. 2. The yolk duct is responsible for transporting nutrients from the egg to the developing embryo.
   卵黄管负责将营养物质从蛋输送到胚胎发育中。
3. 3. During fertilization, the sperm swims through the yolk duct and meets with the egg.
   在受精过程中，精子通过卵黄管游动并与卵子相遇。