standards for grading skills 技术等级标准
A new set of standards for grading plant disease in the fields is offered based on practical experience.
并根据实践建立了一套新的田间单株病情分级标准。
The Japanese beef grading system measures overall quality on a scale of one to five, and the level of marbling on a scale of one to 12 (anything over six is off the charts for U.S. standards).
日本的牛肉等级划分制度将整体质量划分为1 - 5五个档次，而脂肪纹路又划分为1 - 12十二个等级(按照美国标准任何超过等级六的食材都是超标的)。
Collectors throughout the world are familiar with NGC and PMG grading standards, and this makes it possible for them to buy COINS even if they do not have the opportunity to view the items personally.
世界各地的收藏家都了解NGC和PMG的评级标准，这使得他们在买卖钱币时甚至不需要亲自察看钱币。
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