北美夜鹰

An insect-eating nocturnal North American bird of the goatsucker family, having spotted brown feathers that blend with its woodland habitat.

三声夜鹰一种北美产的食昆虫夜间活动的鸟属，羽毛有斑点，褐色，可与其林间栖息地点的颜色相混

Mainly nocturnal North American goatsucker.

主要在夜间活动的北美夜鹰。

Any of various small North American sandpipers.

美国南部象北美夜鹰的大鸟。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。