Poplars

With straight trunks and branches, white poplars aim high.

那是一种力争上游的一种树，笔直的干，笔直的枝。

But the trees from Alberta activated a different group of genes in response to the "drought" than the poplars obtained from Saskatchewan.

但是，取自于亚伯达（Alberta）的柳树枝因对过去干燥环境的“记忆”产生了一组与取自于萨斯喀彻温省（Saskatchewan）的不同的基因。

Abrams Creek was running clear and cool, shaded by tulip poplars, pawpaws, and pines, on the day I belly flopped in with Shute and Rakeslast fall.

阿帮峦溪的水流清澈见底而又凉意十足，溪流边长满了百合树、巴婆树和松树，去年秋天我和舒特、拉格斯还在这里附近进行了调查。