| 单词 | free space |
| 释义 | > as lemmasfree space free space n. (a) Physics a space that effectively contains no matter, or no electromagnetic field, and so offers no resistance to the motion of physical objects, or electromagnetic waves, respectively; (also) space as contrasted with a linearly bounded region or structure (permittivity of free space: see permittivity n.); (b) chiefly Computing the remaining storage capacity of a device or recording medium, esp. the available capacity of a computer hard drive. ΚΠ 1715 tr. D. Gregory Elements Astron. II. vi. 844 The Planets are carried by a Motion, compounded of a projectile Motion along a right line, and of Gravity towards a central Body (about which they are moved in a free space and almost void of Matter). 1800 M. Young Anal. Princ. Nat. Philos. 23 The laws of motion relate immediately to the actions of bodies in free space. 1851 M. Faraday in Philos. Trans. (Royal Soc.) 141 126 In an absolute vacuum or free space, a magnetic body tends from weaker to stronger places of magnetic action. 1917 Physical Rev. 9 167 For all three metals..the effective mass of the carrier comes out somewhat larger than the accepted value for the mass of a slow moving electron in free space. 1962 A. R. W. Hayes Revision Physics v. 170 In free space an applied field H oersted produces a flux density H gauss; in a magnetic medium the flux density is modified to a value B gauss. 1968 Computer Jrnl. 10 162 A procedure for compacting the store such that all of the free space forms a single element. 1996 H. G. Cragon Memory Syst. & Pipelined Processors iii. 182 A full discussion of the many techniques for compacting fragmented free space and de-allocated space..is outside the scope of this book. 2006 Computer Weekly 4 July 14/3 The resulting oscillation of the electrons makes them produce microwave energy which can then be used to broadcast electric signals in free space without the weakening caused by wires. < as lemmas |
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