Be due to a great variety and minute particle size and multivariate shape and great difference in particle's size, which brings difficulty to separation of pollens.
但由于花粉种类繁多、颗粒微小、不同种类花粉形状多变且大小相差很大，这给花粉的分选带来极大困难。
The improvement to the method of variable combination makes the problem of dual variable separation in geometric programming with a multi difficulty degree simple and easy to solve.
对变量组合法进行了改进，使多困难度几何规划中对偶变量分离问题简单易解。
The geographical and cultural separation of the company from its marketplaces causes great difficulty in communicating effectively.
地域限制和文化差距，给公司和市场的交流造成困难。
The geographical and cultural separation of the company from its marketplaces causes great difficulty in communicating effectively.
地域限制和文化差距，给公司和市场的交流造成困难。
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