也许你应该尝试一些拼写变化:
irrigation requirements » irrigation equipment, nutrition requirements
requirements under » requirements using, requirements based, requirements case
under divisions » gender divisions, new divisions, upper division
array imaging » arrays imaging, airway imaging, ray imaging
array arcing » array forming, array probing, array sharing
arrays long » arrays ang, arrays load, array along

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

• If you are trying to use Boolean operators, they must be ALL CAPS: irrigation requirements under divisions ((((array arcing) OR (arrays long))) OR (array imaging))~.
• Adding a wildcard symbol may retrieve word variants: irrigation requirements under divisions ((((array arcing) or (arrays long))) or (array imaging))*.