The sun, is also variable over a long term: its heat output goes up and down in cycles, the latest trend being downward.
太阳在长期内也是变化的：它的热量输出在周期中有上升，也有下降，最近的趋势是下降。
And the trend held regardless of the temperature in the anemones' tide pool homes, a variable that can affect behavior.
并且其持续趋势不考虑海葵池潮汐温度影响，一个可变因素就能影响其反应。
Secular trend is the value of the variable tends to increase or decrease over a long period of time.
长期趋势是指变量的值在一个长时期内所呈现的增加或减少的趋势。
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