(续上)……因为新泉容易坍塌;若是泉壁已稳的旧泉,或许连靠雨水就够的田也可以浇。
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……因为这种泉容易坍塌。
as it is likely to collapse.
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但若是不是新涌的泉,泉壁已经稳固,不会坍塌,那么即使是平常靠雨水就够的田也可以浇灌。
But in the case of a spring that did not just emerge, which is not likely to collapse because its walls have already stabilized, even a field that ordinarily suffices with rainwater may be irrigated.