0 If something is obligatory, you must do it because of a rule or law, etc.:
1 (of an action) expected, esp. because it is what most people do:
2 if something is obligatory, you must do it because of a rule or law:
The underlying dynamics of sibling relationships have been identified as balanced reciprocity, optional rather than obligatory exchange of support and the maintenance of personal autonomy.
To suppose that all formally valid laws are morally obligatory is a moral error.
Partial effects can be interpreted in terms of mutual (de)stabilization rather than obligatory inclusion.
Under most circumstances, few would expect an obligatory relationship between the activation of some eccentric retinal ganglion cells and the initiation of an eye movement.
The language exhibits obligatory subject-verb agreement, two pronominal genders (animate and inanimate), and morphologically marked tense-aspect, postpositions, definitization, and pluralization.
He was in favor of obligatory instruction for children because he feared that otherwise parents would exploit them.
Quite obviously though, this is not an explanation ; the question was, why is coreference obligatory in these constructions.
Take is usually a transitive verb, yet although it has an obligatory direct-object argument, locative arguments are normally optional.
中文繁体
(根據規定、法律等)必須履行的,強制性的,有義務的, (因為常發生而)必然的,預料之中的, 慣常的…
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(根据规定、法律等)必须履行的,强制性的,有义务的, (因为常发生而)必然的,预料之中的, 惯常的…
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obligatorio…
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obrigatório…
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強制的な…
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zorunlu, mecburi…
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