1 the sign (ˈ) used for showing that you have left a letter or letters out of a word as in ‘I'm’, ‘can't’ or ‘we'll’ 表示省略的撇号(ˈ)（例如在 I'm、can't、we'll 等中的）

2 the sign (ˈ) used for showing who or what sth belongs to as in ‘John's chair’, ‘the boy's room’ or ‘Russia's President’. 表示所有格的撇号(ˈ)（例如在 John's chair 约翰的椅子、the boy's room 那男孩子的房间或 Russia's President 俄罗斯总统等中的。）