Based on the conventional paraffin sectioning method, observation was done at the optical level on the dynamics of starch during the ovular development in barley.

运用常规石蜡制片法，在光学水平观察了淀粉在大麦胚珠发育中的消长动态。

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Less accuracy, lower speed and easy to be influenced by individuals are characteristic of the traditional optical level, on which the measured data are read by human eyes mainly.

传统光学水准仪主要靠人工目视读数，存在精度低、测量速度慢、易受人为影响等问题。

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These new models feature ATI Radeon HD4670 video cards, a subwoofer, Dolby Surround II capabilities, 16:9 cinema-level displays, and Blue-ray optical drives.

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While the entry-level GZ-E320 misses out on the highlight mode, all five models share a 40X optical zoom, 1080p shooting from a BSI CMOS sensor, an SDXC card slot and a 3-inch touchscreen for previewing any would-be masterpieces.

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Taking HD video to the next level, the COOLPIX P7700 is capable of intelligent autofocus while recording in any mode as well as optical zoom when shooting in Auto mode.

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