Ahead of the warm front, the bands are broadly parallel to the airflow in the rising section of the conveyor belt, whereas in the warn sector they parallel the cold front and the low-level jet.

在暖锋前，这条带状区域横向平行于传送带上升区中的气流，然而，在暖区中，则平行于冷锋和低空急流。

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If a camera detects a blemish on a chip, it sends a signal to one of the airhoses under the conveyor, and a jet of air blows the chip off onto the floor.

NEWYORKER: Snacks for a Fat Planet