He had much difficulty in breeding tropical plants in his garden.
他费了很大的劲在花园里培育热带植物。
Conventional intercrossing of peach have many shortcomings, which bring biggish difficulty to breeding work.
桃的常规杂交育种存在很多弊端，给育种工作带来较大的困难。
Especially, what self-crossing is highly no appetency makes easy lose of good single genotype, which propagatation and conservation of good varieties breeding brings great difficulty.
特别是自交高度不亲和性，往往使得优良单株基因型很容易丢失，给优良品种选育材料的繁殖和保存带来了极大困难。
The results showed that main factors were artificial breeding skill, cost, ration and feeding skill, labor difficulty, live beef market, butcher skill, etc.
调查结果表明，主要的影响因素有：人工授精技术、推广经费问题、饲料与饲养管理技术、肉牛销售与市场、肉牛屠宰加工技术等等。
The results showed that main factors were artificial breeding skill, cost, ration and feeding skill, labor difficulty, live beef market, butcher skill, etc.
调查结果表明，主要的影响因素有：人工授精技术、推广经费问题、饲料与饲养管理技术、肉牛销售与市场、肉牛屠宰加工技术等等。
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