Correct

习得

/ xí de / 
Strokes

Definition

to learn/to acquire (some skill through practice)/acquisition

Example

As a Verb

acquire; learn

1
Dìèr
第二
yǔyán
语言
xíde
习得

second language acquisition

2
Hòutiān
后天
xí
习
de
得
de
的
jìnéng
技能

acquired skill