Think of a field that keeps growing crops or a factory that keeps turning out goods — 'productive' carries that feel of bringing a lot forth for the effort put in. So a productive day, worker, or meeting is one that yields real results rather than spinning its wheels.
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原始詞典資料7 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
productiveadj/pɹəˈdʌk.tɪv/
- 1
Capable of producing something, especially in abundance; fertile.
- 2
Yielding good or useful results; constructive.
- 3
Of, or relating to the creation of goods or services.
- 4
human-scienceslinguisticssciencesConsistently applicable to any of an open set of words.
- Moreover, this relationship is a productive one, in the sense that when new Adjectives are created (e.g. ginormous concocted out of gigantic and enormous), then the corresponding Adverb form (in this case ginormously) can also be used. And in those exceptional cases where Adverbs do not end in -ly, they generally have the same form as the corresponding Adjective, as with hard, fast, etc.
- In practice, a productive prefix yields many attested words (especially new coinages) without loss of meaning. For example, re- (“again”) is highly productive (rebuild, rethink), whereas other prefixes are relatively less so.
- 5
medicinesciencesOf a cough, producing mucus or sputum from the respiratory tract.
- 6
medicinesciencesOf inflammation, producing new tissue.
- 7
mathematicssciencesset-theoryA type of set of natural numbers, related to mathematical logic; a set S is productive if there exists a total recursive function f such that ∀x∈ℕ,~~W_x⊆S⇒f(x)∈A⧵W_x, where W_x is a recursive function whose Gödel number is x.
- a productive set
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。