污水色度的测定一般采用稀释倍数法，该方法在用人眼判定稀释后的水样是否接近无色时容易引起误差。

The method for determine sewage's chroma is method of dilution multiple. It's easy to bring in error when using eyes to determine the diluted sample is whether achromatism or not.

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在这次拍卖会上的明星拍品中，有一件是12英寸的爱马仕柏金（Hermès Birkin）哑光喜马拉雅鳄鱼皮手袋，它采用白金配件，镶嵌着245颗F级无色钻石，重量接近10克拉。

One of the auction's stars was a 12-inch Hermès Birkin matte Himalayan crocodile handbag, with white-gold hardware set with 245 F-color diamonds weighing close to 10 carats.

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