contractional怎么读，contractional什么意思，contractional短语和例句

1.Excessive use of the brain causes dizziness, palpitation, contractional palpitations and other symptoms.

用脑过度也会引起头晕、心慌、收悸等症状。

2.Excessive use of the brain causes dizziness, palpitation, contractional palpitations and other symptoms.

用脑过度也会引起头晕、心慌、收悸等症状。