詹姆斯·韦伯太空望远镜(JWST)体态硕大无比- - -其多层遮阳板的长度将达22米，几乎是哈勃太空望远镜的两倍。
The James Webb Space Telescope (JWST) will be a giant-its multilayered sun shield stretches 22 meters, nearly twice the length of the Hubble Space Telescope.
这些物体是大量存在的，据NASA估计，仅地球28 000 000英里范围内超过330英尺宽的小行星就达19 500个，使用望远镜就可以观测到。
NASA estimates there are 19 500 asteroids at least 330 feet wide - large enough to detect with telescopes - within 28 million miles of Earth.
虽然结肠镜检查是检测结肠癌前驱病变的最有效的方法，但1997年报告的总体结直肠肿瘤的漏检率仍达24%。
Although the colonoscopy is considered the most effective means to detect precursors of colon cancer, the overall reported rate of missing colorectal tumors is 24 percent, as reported in 1997.
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