However, sometimes a seemingly benign introduction creates environmental travesty and ecosystem despair.

然而，有时看似良性的引入却形成了滑稽的环境，或使生态系统陷入困境。

youdao

First, this paper introduces three basic worms propagation models and analyzes four situations after the introduction of benign worm.

首先介绍三个基本的蠕虫传播模型，分析了引入良性蠕虫后的四种情况。

youdao

Wanless warned, basically, that if you are going to spend more, you need to spend it wisely and upfront so that the benign impacts of productivity filter through into every future year (key to this, remember, was the introduction of a national IT infrastructure for the NHS, which turned out to be a disaster and has failed).

BBC: Health Bill: Where's the strategic argument?