constructive

constructive
adjective

serving a useful purpose
建设性的；有用的；有益的
constructive advice.
有益的建议。
(Law)derived by inference; not obvious or stated explicitly
(律)推定的
constructive liability.
推定责任。
(Mathematics)relating to, based on, or denoting mathematical proofs which show how an entity may in principle be constructed or arrived at in a finite number of steps
(数)（与）推断（有关）的；以推断为基础的

派生
constructively
adverb
constructiveness
noun
语源

mid 17th cent. (in sense 2): from late Latin constructivus, from Latin construct- 'heap together', from the verb construere (see construct)

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