The coronavirus pandemic has had positive and negative effects on Kenya.

疫情对肯尼亚同时产生了积极和消极的影响。

Just extending one's career may have both positive and negative effects.

2. 仅仅延长一个人的职业生涯可能会产生积极和消极的影响。

Ultimately, scientists believe the laws need to change around clinical testing of the drug so advanced research can be executed to fully understand both the positive and negative effects that this " magic" fungus has on our brains.

最终，科学家认为关于药物临床试验的法律需要进行改变，这样先进的研究才能实施，去充分了解这种“神奇”真菌对我们大脑的正面和负面影响。