obligatory
Definition
Required by a rule, law, or social custom; mandatory.
中文 由规则、法律或社会习俗所规定的;强制性的。
Example
"Wearing a helmet on the construction site is obligatory for safety."
Required by a rule, law, or social custom; mandatory.
中文 由规则、法律或社会习俗所规定的;强制性的。
"Wearing a helmet on the construction site is obligatory for safety."