Irrigation and nutrient supply lines feed into the soil beds, and sensors tell us what the crops need.

灌溉和养分供应管线进入土壤床， 传感器告诉我们作物需要什么。

Initially the telescope used line feeds, elongated receivers that could gather signals within the focal line of the spherical dish.

最初， 望远镜使用线馈送，细长的接收器可以收集球面盘焦线内的信号。

It suffered a broken line feed that fell from the instrument platform and crashed through the dish, among other damage.

它的线路馈线断了， 从仪器平台上掉下来， 撞穿了盘子，还有其他损坏。

But, they could only measure signals within a narrow bandwidth, so line feeds would have to be swapped to change the frequency of the telescope.

但是， 它们只能测量窄带宽内的信号，因此必须交换线路馈电才能改变望远镜的频率。