New words：

pitch black [pitʃ] adj. 漆黑的；漆黑一片
pitch dark adj. 漆黑的；漆黑一片

Sample Sentences：

Outside it was pitch dark and it was raining cats and dogs.
To them Chairman Mao shone as a star in the pitch-black night.
Standing in the pitch black, we had no idea what our surroundings looked like.

surrounding [sə'raundiŋ] n. 环境；周围的事物

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