复数： speculations

Profitable speculation requires buying low and selling high .

有利可图的投机行为要求低买高卖。

People who know mr reinemund well dismiss such speculation .

了解雷蒙德的人都不懈于此种推测。

But malicious speculation on the board has also occurred frequently .

但针对创业板的恶意炒作也频频发生。

But many investments appear to be pure speculation that leaves land fallow , the report found .

报告指出，很多投资似乎只是单纯的投机买卖，使得大量的土地闲置。

There is huge speculation about what north korea seeks to gain by raising the tension levels .

朝鲜想通过提高紧张的级别来得到什么是一个巨大的思考。