双 /shuāng/ angolul

pair [pairs]▼(two similar or identical things)
noun
[UK: peə(r)] [US: ˈper]

bi-▼(two-)
adjective
[UK: ˌbaɪ] [US: ˌbaɪ]

di-▼(two, twice, double)
adjective
[UK: dɪ] [US: dɪ]