relating to the hemispheres (= halves) of the brain

Early injury to the brain may result in a shift of hemispheric dominance for speech. 年少时大脑受伤可能导致控制说话的大脑半球优势发生改变。

The study examines the relationship between left and right hemispheric functioning in specific psychiatrically disordered populations.

relating to a hemisphere (= half) of the earth, especially the western half that includes North and South America

He made his first trips to Mexico and Canada and declared that his foreign policy, unlike that of previous presidents, would focus primarily on hemispheric affairs. 他首次访问了墨西哥和加拿大，并宣布他的外交政策与以往的总统不同，将主要关注西半球事务。

We used to think pollution could be controlled locally and regionally, and now it is turning into a hemispheric problem. 我们曾经认为污染可以在当地和区域内得到控制，而现在却正在变成一个半球性的问题。