exert: vt.1.用(力)，尽(努力等)，行使(职权等)。2.发挥(威力等)，使受(影响等) (on; upon). 短语和例子exert an influence 施加影响。exert all one's powers 尽全力。 exert oneself 努力，尽力，出力(exert oneself to the utmost 尽全力)。
The recreational value of these features is derived from both their quality and extent of the resource , while ironically , simultaneously exerting pressures upon them 这些地方的康乐价值取决于自然资源的质素及范围，但讽刺的是，康乐发展又对自然资源本身构成压力。
