The results stated that:the cost of cocoon production has showed first increasing then decreasing;
结果表明:近二十年来浙江省蚕茧生产成本呈先增长后下降的趋势;
A trend of total fluorescence intensity first increasing and then decreasing was showed with the time.
总荧光强度随时间呈现先升高后降低的趋势。
With the technological and other key elements remaining the same, their marginal income is increasing first and then decreasing gradually.
在技术水平和其他要素的投入不变的情况下,边际收益是先递增后递减。
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