这幅画是由多幅照片合成的。

Zhè fú huà shì yóu duō fú zhàopiàn héchéng de.

This painting is composed of multiple photos.

这首歌曲是由几个音轨合成的。

Zhè shǒu gēqǔ shì yóu jǐ gè yīnguǐ héchéng de.

This song is composed of several audio tracks.

合成材料在建筑中得到广泛应用。

Héchéng cáiliào zài jiànzhù zhōng dédào guǎngfàn yìngyòng.

Synthetic materials are widely used in construction.