tor·sion·al /ˈtɔrʃnəl, ʃənḷ/ 形容詞
扭轉的,捩轉的
Tor·sion·al a. Of or pertaining to torsion; resulting from torsion, or the force with which a thread or wire returns to a state of rest after having been twisted round its axis; as, torsional force.
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