After several X-rays and MRI scans, the doctor told me that I couldn't return to my sport anymore.
经过几次X光和核磁共振扫描，医生告诉我，我不能重回到我的运动中了。
But several times a year, when time and tide align, manta rays from throughout the Maldives converge here to feed in a spectacular coral-reef ballet.
但是，当时间与潮流相吻合时，这里每年都会上演好几次蝠鲼争食的壮观芭蕾舞剧。
Doctors use several tools to screen for colon cancer and precancerous lesions, including blood tests and imaging technologies such as X-rays and CT scans (also known as "virtual" colonoscopies).
医生运用几种措施筛查结肠癌以及癌前期病变，包括血液检测以及如x 线和CT筛查（也称虚拟结肠镜）的影像学手段。
Several layers of shielding will safeguard the payload from cosmic rays, meteorites, and atomic oxygen.
几层防护屏将保护有效负载免受宇宙射线、陨星和原子氧的危害。
Photon efficiencies and forward directional characteristics of X-rays for several kinds of often-used targets were calculated and analyzed.
对几种靶的光子效率和X射线前向性随靶厚度变化进行了计算和分析。
Photon efficiencies and forward directional characteristics of X-rays for several kinds of often-used targets were calculated and analyzed.
对几种靶的光子效率和X射线前向性随靶厚度变化进行了计算和分析。
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