a. 表面的, 假装的, 看得出的

[经] 表面的, 诡称的

Ostensible \Os*ten"si*ble\ ([o^]s*t[e^]n"s[i^]*b'l), a. [From L.
ostensus, p. p. of ostendere to show, prop., to stretch out
before; fr. prefix obs- (old form of ob-) + tendere to
stretch. See {Tend}.]
1. Capable of being shown; proper or intended to be shown.
[R.] --Walpole.

2. Outwardly appearing to be; shown to be; exhibited;
apparent; evident.
[1913 Webster +PJC]

3. Declared; avowed; professed; pretended; -- often used as
opposed to {real} or {actual}; as, an ostensible reason,
motive, or aim. --D. Ramsay.
[1913 Webster +PJC]