也許你應該嘗試一些拼寫變化:
introduction complementary » introduction commentary, introduction elementary, interactions complementary
complementary problems » complementary problem, complementarity problems, complementarity problem
problems diffraction » problems directions, problems differential, problems fiction
microarray profiling » microrna profiling
arrays probing » array probing, rays probing, arrays producing

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• If you are trying to use Boolean operators, they must be ALL CAPS: introduction complementary problems diffraction ((microarray profiling) OR (arrays probing))~.
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