Correct

缺门

/ quē mén /
Strokes

Example

As a Noun

gap (in a branch of learning, etc)

1
Zhè
xué
学科
zài
men
我们
zhè
这里
háishi
还是
quē
mén

We have a gap in this branch of learning.

2
Tián
填补
quē
mén

fill (in/up)/supply/stop/bridge/close a gap