Meaning of liǎ:
俩
two (colloquial equivalent of 兩個|两个); both; some
Wǒmen liǎ yīqǐ qù kàn diànyǐng ba.
我们俩一起去看电影吧。
Let's go watch a movie together.
Tāmen liǎ dōu xǐhuān tī zúqiú.
他们俩都喜欢踢足球。
Both of them like playing soccer.
Wǒmen liǎ jīnwǎn qù chīfàn.
我们俩今晚去吃饭。
The two of us are going out for dinner tonight.
used in 伎倆|伎俩[ji4liang3]
Tāmen lái le, zhōngyú jiàn dào zhè liǎo lǎo péngyǒu le.
他们来了,终于见到这俩老朋友了。
They have arrived, it's finally great to see these two old friends.