Similar to 必要条件

Menelaus of Alexandria

List of things named after Alexander Grothendieck

Pavel Alexandrov

Alexandroff extension

Alexandrov theorem

Aleph number

Allen–Cahn equation

Nachman Aronszajn

Aronszajn tree

If and only if

(RS)-N-Nitrosonornicotine

BSD-based

+

.bu

.example

.html

.invalid

.mka

.mkv

.xls

/dev/urandom

1,4-Dibromobenzene