杂交育种技术是培育优良树木品种的有效方法，在主要经济树木育种中已得到广泛的应用。
Crossbreeding as a effective way to cultivate excellent trees variety has been extensively applied on major economic trees breeding.
有些种类的树木已经被有经济头脑的林农淘汰出局，因为它们生长得太慢，或者作为木材作物的售价太低。
Some species of tree have been read out of the party by economics-minded forestersbecause they grow too slowly, or have too low a sale vale to pay as timber crops.
有些种类的树木已经被有经济头脑的林农淘汰出局，因为它们生长得太慢，或者作为木材作物的售价太低。
Some species of tree have been 'read out of the party' by economics-minded foresters because they grow too slowly, or have too low a sale value to pay as timber crops.
本主题表示要拥有大量森林覆盖和立木材积的总愿望，包括森林外树木，以支持林业的社会、经济和环境方面。
The theme expresses an overall desire to have significant forest cover and stocking, including trees outside forests, to support the social, economic and environmental dimensions of forestry.
栎树为栎属植物的统称，在我国分布范围很广泛，是具有很高经济价值的树木资源。
Oak, a general designation of oak plant genera, are tree resources of considerable high economic value and widely distributed in China.
课程包括树木的培植和管理，政策和经济等。
Their studies cover everything from the breeding and measurement of trees to policy and economics.
在经济价值方面，有食用菌77种，药用菌43种，毒菌24种，木材腐朽菌93种，树木共生菌32种。
In the economy meaning, there are 77 edulis fungi, 43 medical fungi, 24 poisonous fungi, 93 ectotrophic mycorrhiza fungi and 32 wood rotten fungi.
在经济价值方面，有食用菌77种，药用菌43种，毒菌24种，木材腐朽菌93种，树木共生菌32种。
In the economy meaning, there are 77 edulis fungi, 43 medical fungi, 24 poisonous fungi, 93 ectotrophic mycorrhiza fungi and 32 wood rotten fungi.
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