flow spill valve

• 溢流活门

flow spill valve的用法和样例：

例句

1. All that is required is a valve.
   全部所需的就只是一个活门。
2. As your baby feeds, the built-in anti-colic valve flexes to allow air into the bottle to prevent vacuum build-up.
   当你喂宝宝的时候，内置的防绞痛活门，可以让空气进入奶瓶，防止瓶内发生真空状态。