图1：每个用例都有一组分配的情境。

Figure 1: Every use case has an assigned set of scenarios.

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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。

Host recognition of insect is the result of perception of the chemical spectrum which constructed from definite chemical components and ratios.

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计算结果给出了温度场、速度场及组分变化分布图。

A distribution diagram showing the variation of temperature and speed field and constituent elements was provided by the calculation results.

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