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| 31. | The mission took the direct route by air to the boundary. |
| 代表团搭飞机走直线的路径到边界。 |
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| 32. | intensity of sunshine, the rise and fall of temperature, the fluctuation of humidity, and the zigzag cyclic route |
| 在每个洞窟的不同位置精心布下各种探头，让这些灵敏的传感器在不同梯度上捕捉日照的强弱，温度的升降，湿度的波动，气流在洞内行曲走折的循环路线。 |
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