| 释义 |
DEFINITIVE EXAMPLES 权威例句〔epoch〕Astronomy An instant in time that is arbitrarily selected as a point of reference.【天文学】 历元:被随机选作参考点的时间中的某一瞬间美国传统〔keyword〕A word used as a reference point for finding other words or information.参考词:对于找到其他词或信息提供参考点的词美国传统〔temperature gradient〕The rate of change of temperature with displacement in a given direction from a given reference point.温度梯度:从一给定的参考点,伴随着在给定方向上温度变化的速率美国传统 |