yào / bù / shì / hǎo / xīn / rén / dā / jiù / ， / nà / gè / luò / shuǐ / de / hái / zi / kě / néng / jiù / méi / mìng / le / 。

要不是好心人搭救，那个落水的孩子可能就没命了。

If it weren't for the kind person who rescued him, the drowning child might have lost his life.