unitary

1. 費(fèi)密子一種如電子、質(zhì)子或中子等自旋為半整數(shù)的基本粒子，具有一種使得不可能有多于一個(gè)的粒子占有任何一個(gè)特殊的量子力學(xué)態(tài)的量子力學(xué)對(duì)稱性
   A particle, such as an electron, a proton, or a neutron, having half-integral spin and obeying statistical rules requiring that not more than one in a set of identical particles may occupy a particular quantum state.
2. 非特定的代表某一種類的所有成員或其中一個(gè)的；不標(biāo)志唯一存在的
   Representing one or all of the members of a class; not designating a unique entity.
3. 他克服了一個(gè)又一個(gè)的困難以后才得脫身。
   He managed to cash in only after overcoming one difficulty after another.
4. 不止一個(gè)的；許多的
   Being more than one; several.

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