那的确是一段抑郁，容易偏执钻牛角尖的日子。
Ongoing from that was a phase of a propensity for depression, for compulsion, for paranoia.
接下来的2公里是上坡，一段平坦路段，接着继续上坡，15公里点位于尖尖的坡顶。
The next 2 km are uphill then flat and the 15k point is at the end of sharp downhill.
微小的茎尖切段通常是难以培养的。
Minute fragments of shoot apices are proverbially difficult to culture.
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