Now the broodsacs are acquired by snails by ingesting the eggs in bird droppings.

蜗牛吃掉了含有彩蚴吸虫虫卵的鸟粪。

Place the bird feeder in a different place regularly to avoid the buildup of discarded seed shells and bird droppings on the ground.

定期将喂鸟器放置在不同的地方，避免丢弃的种子壳和鸟粪堆积在地上。

They're a reminder that what we see flapping around us today is just a bird dropping in the bucket of what has come before.

它们提醒我们，今天我们周围振翅飞翔的鸟类，只不过是地球出现过的鸟类中的沧海一粟。

Lichtman: They're a reminder that what we see flapping around us today is just a bird dropping in the bucket of what has come before.

Lichtman：它们提醒我们，我们今天看到的在我们周围拍打的东西只是一只鸟掉进了以前发生的事情的桶里。