【英语时差8,16】山楂树如何帮助构建生态平衡

 Extinct animals are gone for good, but living species can sometimes tell us about the food chains that existed long ago. Hawthorns² are members of the rose family with thorns up to five inches long. Like the thorns of other roses, these long thorns evolved as protection against animals. The theory that thorns keep plants from being eaten makes sense, except that all the animals living today that might eat the hawthorn¹ — such as deer and wild goats — are small enough to reach between the big thorns. A moose might be deterred³ by the large thorns, but moose and hawthorns don’t live in the same habitats. In fact the hawthorn’s protection isn’t really effective against anything that the hawthorn has to worry about.

1 hawthorn   

山楂

参考例句：

• A cuckoo began calling from a hawthorn tree.一只布谷鸟开始在一株山楂树里咕咕地呼叫。
• Much of the track had become overgrown with hawthorn.小路上很多地方都长满了山楂树。

2 hawthorns   

n.山楂树( hawthorn的名词复数 )

参考例句：

• With beating hearts, they descended through the hawthorns. 于是他们怀着忐忑不安的心情，穿过山楂丛，走下山坡。 来自辞典例句
• Some trees, such as junipers, cherries, and hawthorns, produce fruits that are eaten by birds. 有些树种如桧柏、樱桃和山楂结出能被鸟类吞食的浆果。 来自辞典例句

3 deterred   

v.阻止，制止( deter的过去式和过去分词 )

参考例句：

• I told him I wasn't interested, but he wasn't deterred. 我已告诉他我不感兴趣，可他却不罢休。
• Jeremy was not deterred by this criticism. 杰里米没有因这一批评而却步。 来自辞典例句