A stroke affecting the right side of the brain may cause contralateral paralysis, affecting the left arm and leg.在大脑右侧发生的中风可能引起身体对侧瘫痪，影响左臂和左腿。Many plants produce a pair of buds on opposite sides of the stem, in which case prune just above them.很多植物会在花梗对侧长出一对花苞，在这种情况下要把花苞以上部分剪掉。