Complex sentence: Tzu Chi nuns (bhikkhunis) do not rely on donations for their sustenance; in earlier days they maintained their livelihoods by farming and by weaving and other handicrafts; more recently, mostly by manufacturing electrical circuit breakers and other products.
Split into simpler sentences: Tzu Chi nuns (bhikkhunis) do not rely on donations for their sustenance. In earlier days, they maintained their livelihoods by farming and by weaving and other handicrafts; more recently, by manufacturing electrical circuit breakers and other products.