【上位】 a general tendency to change (as of opinion); "not openly liberal but that is the trend of the book"; "a broad movement of the electorate to the right" 一般的に変化する傾向の（意見などで）。
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【下位】 an evolutionary trend to be born earlier so that development is cut off at an earlier stage and juvenile characteristics are retained in adults of the species 開発が初期段階で止められ、幼生の特徴がその種の成体で保持されるように、早期に生まれる進化傾向。
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