There’s a bench under a poplar tree.

白杨树下有一条长凳。

Crows cawed from the poplar trees overhead.

白杨树鸦在空呱呱乱叫。

In this study, 21 elite poplar varieties of Tacamahaca and Aigeiros were fingerprinted using AFLP markers.

本试验采用AFLP对来自青杨组和黑杨组21个重要杨树种（无性系）鉴定与遗传相关性进行了研究。