在上世纪70年代末和80年代初，对非洲稀树大草原大象的杀戮呈现激增态势，很重要的原因来自于亚洲对象牙雕刻品的不断增加的需求。

In the late nineteen-seventies and early eighties, there was a spike in the killing of Africa's savanna elephants, caused largely by increased demand in Asia for ivory carvings.

youdao

当加光子相干态的平均光子数较大时，原子线性熵呈现崩塌与回复现象，其回复周期随加光子数的增加而增加，与原子的初态无关。

With the increasing of the mean photon number, the revival period increase. The atom collapses to a unique pure state regardless of the initial atomic conditions.

youdao

在这个世纪初几个重要的发现帮助地理学家呈现了一些更准确的地球内部构造的图像。

There were several important discoveries in the early part of this century that helped geologists develop more accurate picture of the Earth interior.

youdao