注意第一张照片的绿圈。
Notice the first photo, circled in green, the hinge is protuding out slightly.
看到照片中的绿圈了吗？…这就是要取下的螺丝。
Look at the green circles on the photo... These are the screws to remove.
这片位于沙漠里的密集绿圈代表由中枢灌溉系统支持的农业生产。
Green circles in the desert frequently indicate tracts of agriculture supported by centre-pivot irrigation.
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