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Use "facultatively" in a sentence
"Aren't they ALL folksy, blue-eyed, facultatively bipedal teratomas over there?"
"Increased productivity at lower trophic levels is likely to result in increased growth in early years for facultatively anadromous species that promotes a shift to wholly freshwater life histories"
"Most anadromous species in the Arctic are facultatively anadromous [2] in that many individuals in a population do not necessarily migrate to sea even though it is accessible."