2 sentences

1. 婴儿正在吮吸母亲的乳头。

   yīng'ér zhèng​zài shǔn​xī mǔ​qīn de rǔ​tóu.

   The baby is sucking on the mother's nipple.

   Source: Dong Chinese Dictionary

2. 婴儿正含着母亲的奶头吮吸。

   yīng'ér zhèng hán zhe mǔ​qīn de nǎi​tóu shǔn​xī.

   The baby is sucking on the mother's nipple.

   Source: Dong Chinese Dictionary