alder

UK:  ['ɔːldə(r)]

US:  ['ɔldər]

复数：alders  

n.

1.【植物;植物学】桤木

un.

1.奥尔德(Kurt,1902-,德国化学家,曾获1950年诺贝尔化学奖)

1 . Therefore, only the four legs and a layer on top are made of American alder; the materials for the other parts cannot be confirmed.
因此，只有四条桌腿和表层是美国桤木；其他的无法知道是由什么材料组成。

2 . Exploring the woodlands on a warm summers evening, he spotted this lone caterpillar delicately balanced on the stem of a black alder leaf.
在一个温暖夏天的夜晚他探究森林，发现一条孤零零的毛毛虫微妙的平衡在一个黑色桤木叶的茎上。

3 . Among the alder's valuable ecological contributions is its capacity to fix nitrogen in nitrogen-deficient soils.
在桤木的价值中，在生态学上的贡献是在氮缺乏的土壤中巩固氮的存在。

4 . I pointed to where our village lay, on the flat in-shore among the alder-trees and pollards , a mile or more from the church.
我把我们村子的位置指给他看。村子就坐落在距离教堂一英里多远的平坦河岸上，四周耸立着赤杨树和截梢树。

5 . Mr Alder said: "It requires a fairly high degree of pressure to improve standards across the board. "
欧达礼表示：“要普遍提高标准，是需要施加相当大的压力的。”