采用压电传感器和烟迹片分别记录了半圆形弯管中指定点的压力时间曲线和胞格结构。
Pizeo-electric transducers and smoke-foils were respectively used to record the pressure time history at specified ports and cellular structures.
天边渐渐飘出几缕烟迹，并不动，却在加深，疑惑半晌，才发现，那是刚刚化雪的山脊。
There emerged a few pieces of mist from the horizon, not moving but darkening. Puzzled for a long time, I was suddenly enlightened those were just ridges due to snow thawed just now.
他马上向天际望去，看到大群的小物体正在降落，尾部冒着烟划出一道尾迹。
Then he looked to the horizon and saw a swarm of small objects descending, trailing tails of smoke from behind, and he knew.
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