这一渐变群是沿着萨克拉曼多谷地到西瓦内华达山脊的植被带存在的。
This cline exists along a transect from the Sacramento valley to near the crest of the sierra Nevada mountains.
莱思莉说：“你在公园里碰到一群孩子，生活因此而改变，他们渐渐变成家里的一份子。”
"You meet some kids in the park," says Leslie, "and life unfolds, and they become part of your family."
哈雷的现有顾客群正渐渐变老，但在他们身后却没有足够的年轻顾客补充进来。
Its current owners are getting old, and not enough younger ones are coming up behind them.
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