One hypothesis is that the yellow cedar decline may be caused by insect parasites, specifically the cedar bark beetle.
其中一个假说认为黄杉数量下降是由以衫皮甲虫为代表的寄生害虫导致。
For example, the bark and leaves of the yellow cedars are concentrated with powerful chemicals that are poisonous to insects.
比如，黄杉的树皮和叶子上聚集着一些对于昆虫来说有毒的的强力化学物质。
On the pollard willows the long wands are yellow-ruddy in the passing gleam of sunshine, the first colour of spring appears in their bark.
截去树梢的杨树长长的嫩枝在一闪一闪的阳光里呈现出橘红色，春天最初的色彩出现在它们的树皮上。
应用推荐