Field time also can unpredictably vanish, as we discover when the rough, gravel roads take their toll on the rental SUV, which suffers three flats in just two days.

• 野外工作的时间也会因遭逢意外而消逝，颠簸、充满碎石的道路著实教训了租来的休旅车，短短两天内轮胎漏了三次气。