hái zi men / fàng fēi / le / yí gè / hěn / dà / de / hài qì qiú / kàn zhe / tā / piāo xiàng / lán tiān

孩子们放飞了一个很大的氦气球，看着它飘向蓝天。

The children released a big helium balloon and watched it float into the blue sky.