Farming is a hard means of subsistence.
种地是一种艰苦的谋生手段。
Subsistence farming was the only source of livelihood.
生计农作是唯一的生活来源。
Agriculture consists largely of subsistence farming and animal husbandry.
在农业中占很大部分的是种植业和畜牧业。
People living on Orchid Island earn their living by fishing and subsistence farming.
兰屿的居民以捕鱼和自给自足的农业维生。
Therefore, subsistence farming is more sustainable on the land, in the social system, and economically.
因此，自给农业是更可持续的土地上，在社会制度和经济。
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