它在成像物镜的像方空间放置光栅，利用光栅的衍射原理，使来自参考物和被测物的光波在像面发生干涉。

Grating is placed in image space of objective lens, and used as the shearing part. Light wave from reference object and measured object interfered at the image space.

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传统上女人喜欢选择男子气概重的男人作为配偶，因为像方下巴、低眉毛、薄嘴唇这样的面部特征是与优良基因有关的，这样能保证后代更强壮更健康。

Historically women chose manly men because features such as a square jaw, low brow and thin lips were linked to superior genes which would produce stronger and healthier offspring.

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另一方面，像马尼拉麻这样的植物产品，你可以连续好几个礼拜拖着它们穿过海洋。

On the other hand, plant products like Manila hemp, you can drag through the ocean for weeks on end.

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