Host recognition of insect is the result of perception of the chemicalspectrum which constructed from definite chemical components and ratios.
昆虫对寄主植物的识别是由于识别了植物气味的由一定组分、按照严格比例组成的化学指纹图。
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This light is passed through a prism, which breaks it up into a spectrum, and a unique pattern, kind of like a chemical fingerprint of spectral lines for that element appears.
According to Spectrum magazine, Europe has the world's biggest number of robots, an average of 50 per 10, 000 workers, primarily in the car industry, and in foundries and chemical plants.