| 词汇 | phase |
| 词根词缀 | 词源： 1812, "phase of the moon," back-formed as a sing. from Mod.L. phases, pl. of phasis, from Gk. phasis "appearance" (of a star), "phase" (of the moon), from stem of phainein "to show, to make appear" (see phantasm). L. sing. phasis was used in Eng. from 1660. Non-lunar application is first attested 1841. Meaning "temporary difficult period" (especially of adolescents) is attested from 1913. The verb meaning "to synchronize" is from 1938, from the noun. 词根记忆： n. 阶段,状态,时期;相,相位In occasional case the phrase emphasizes the importance of the phase to the laser.在偶然情况下该短句强调了相位对于激光的重要性. |
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