Now, the main challenge was to find the right material for printing clothes with. I mean the material you feed the printer with.
现在，主要的挑战是找到合适的材料来打印衣服，我指的是你放入打印机的材料。
2
Tiffany conceptualized herself as a mother, whose main task was to feed her baby.
蒂芬妮把自己定位为主要任务是养育孩子的一位母亲。
《柯林斯英汉双解大词典》
3
The Washington Post reported, one of the main reasons, experts say, is that farmers have used herbicides on the milkweed plants that these butterflies feed on.