| 单词 | biological shield |
| 释义 | > as lemmasbiological shield biological shield n. a shield used for protection against radiation, esp. one covering a nuclear reactor or cyclotron. ΘΚΠ the world > action or operation > safety > protection or defence > [noun] > means of protection or defence > device or contrivance to protect a thing or person > device or substance protecting from radiation biological shield1949 radioprotector1955 1949 U.S. Patent 2,476,249 5 The mount may be placed over or through a protective wall or so-called biological shield. 1957 Financial Times Ann. Rev. Brit. Industry 66/1 Reinforced concrete also provides the vital barrier against the insidious dangers of radiation. This ‘biological shield’ must totally enclose the reactor. 1998 Pop. Sci. Aug. 67 (caption) A containment structure called the Upper Biological Shield was hurled into the air, and landed in the mouth of the reactor shaft. < as lemmas |
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