stress mark
US /ˈstres mɑːrk/
UK /ˈstres mɑːrk/

1.
重音符号, 重音标记
a mark (such as an accent) used in phonetics to indicate the place of the stress in a word
:
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The dictionary uses a stress mark to show where the emphasis falls.
字典使用重音符号来表示重音落在哪里。
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Learning to recognize the stress marks helps with pronunciation.
学习识别重音符号有助于发音。