也許你應該嘗試一些拼寫變化:
operational functions » rational functions, operations function, operational definitions
functions different » functions difference, functions differential, cations different
different diversion » different dimensions, different conversion, different versions
array imaging » arrays imaging, airway imaging, ray imaging
array along » arrays long, array arcing, array paving
array using » arrays using

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• Performing a fuzzy search may retrieve terms with similar spellings: operational functions different diversion ((((array along) or (array using))) or (array imaging))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: operational functions different diversion ((((array along) OR (array using))) OR (array imaging)).
• Adding a wildcard symbol may retrieve word variants: operational functions different diversion ((((array along) or (array using))) or (array imaging))*.