雅思阅读辅导：生物防治手段

　　阅读段落

　　In the face of the escalating perils from indiscriminate applications of pesticides, a more effective and ecologically sound strategy of biological control, involving the selective use of natural enemies of the pest population, is fast gaining popularity - though, as yet, it is a new field with limited potential. The advantage of biological control in contrast to other methods is that it provides a relatively low-cost, perpetual control system with a minimum of detrimental side-effects. When handled by experts, bio-control is safe, non-polluting and self-dispersing.

　　段落大意

　　本段介绍了一种新型更有效、生态更健康的生物防治手段。

　　阅读笔记

　　Strategy of biological control：more effective and ecologically sound

　　Fast gaining popularity new field with limited potential

　　Advantage： low-cost, perpetual control system minimum of detrimental side-effects

　　逻辑关系

　　1. 对比

　　In the face of the escalating perils from indiscriminate applications of pesticides, a more effective and ecologically sound strategy of biological control, involving the selective use of natural enemies of the pest population, is fast gaining popularity.

　　As yet, it is a new field with limited potential.