The crux of prevention and control of jujube witches broom was to find out the leading factor of causing the disease in the light of local ecological environment and to take appropriate measures.
对于枣疯病的防治，关键是能够根据当地病害发生的生态条件，从中找出致病的主导因素，并有针对性地采取相应的防病措施，完全可以控制枣疯病害的发生和流行。
It was shown that the low content of selenium in the environment is one of the important factor causing the disease.
研究表明，环境低硒是大骨节病发生的重要因素之一。
Coronary artery is an important factor causing coronary heart disease, and arteriosclerosis can cause leg pain, cramps.
冠状动脉硬化是引起冠心病的重要原因，而下肢动脉硬化可引起小腿疼痛、抽筋。
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