3 sentences

1. 他们的技能相辅相成。

   tā​men de jì​néng xiāng​fǔ​xiāng​chéng.

   Their skills complement each other.

   Source: CCMatrix

2. 他和我相辅相成。

   tā hé wǒ xiāng​fǔ​xiāng​chéng.

   He and I complement each other.

   Source: CCMatrix

3. 写作和编辑不一定是同样的技能，但它们确实是相辅相成的。

   xiě​zuò hé biān​jí bù yī​dìng shì tóng​yàng de jì​néng, dàn tā​men què​shí shì xiāng​fǔ​xiāng​chéng de.

   Writing and editing are not necessarily the same skills, but they do complement each other.

   Source: CCMatrix