quword
趣词
Word Origins Dictionary
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
downtime (n.)
[downtime 词源字典]
1952, from
down
(adv.) +
time
(n.).
[downtime etymology, downtime origin, 英语词源]
[downtime 词源字典]