那些树枝上覆盖着一层又黑又黏的树脂。

The branches were coated with a ___pitchy resin that was dark and sticky.

那间老房子的墙壁因多年的煤烟熏染而变得漆黑。

The walls of the old house were stained ___pitchy from years of soot.

吉他手弹奏时有些音准不准，听起来有点跑调。

The guitarist sounded a bit ___pitchy when playing that high note.