a. 形式的, 样式的, 形态上的, 模态的

[计] 模态的

Modal \Mo"dal\, a. [Cf. F. modal. See {Mode}.]
1. Of or pertaining to a mode or mood; consisting in mode or
form only; relating to form; having the form without the
essence or reality. --Glanvill.

2. (Logic & Metaph.) Indicating, or pertaining to, some mode
of conceiving existence, or of expressing thought, such as
the modes of possibility or obligation.
[1913 Webster +PJC]

3. (Gram.) Pertaining to or denoting mood.
[PJC]


Modal \Mo"dal\(Gram.), n.
A modal auxiliary.
[PJC]