Stray light generated in optical system forms a lot of ghost images, which seriously influence the beam quality and propagation properties.
光学系统的杂散光极易在系统内形成多个鬼像,严重影响光束质量和传输特性。
Phosphorus deficiency, which seriously limits yields and distribution of crops, is a problem extensively existing in soils around the globe.
土壤缺磷是世界范围内普遍存在的问题,它严重限制了作物的产量及分布。
Knitting takes focus and fine motor control, which seriously keeps your brain active. And mastering any new skill encourages memory and learning skills in your brain.
编织衣物需要专注力和良好的控制力,这些都能让大脑处于兴奋状态。掌握一门新技巧也能促进大脑的记忆力和学习能力。
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