weight·less /ˈwetləs/
(a.)無重量的,無重力的
Weight·less, a. Having no weight; imponderable; hence, light.
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weightless
adj : having little or no weight or apparent gravitational pull;
light; "floating freely in a weightless condition"; "a
baby bat...fluffy and weightless as a moth"; "jackets
made of a weightless polyester fabric" [ant: weighty]