Usages of shǒujī
我们 已经 买 了 手机。wǒmen yǐjīng mǎi le shǒujī.
We already bought a phone.
我 买 了 手机, 她 也 想 买。wǒ mǎi le shǒujī, tā yě xiǎng mǎi.
I bought a phone; she also wants to buy one.
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