也许你应该尝试一些拼写变化:
preparation process » separation process, separation processes, preparation programs
basic dimensions » based dimension, pacific dimensions, design dimensions
array formulas » area formulas, harrop formulas, array format
process basic » processes basic, progress basic, process based
array formats » array format, assay formats, ready formats
array forming » array format, array arcing, array fermi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: preparation process basic dimensions ((((array formats) or (array formulas))) or (array forming))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: preparation process basic dimensions ((((array formats) OR (array formulas))) OR (array forming)).
• Adding a wildcard symbol may retrieve word variants: preparation process basic dimensions ((((array formats) or (array formulas))) or (array forming))*.