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等變線...
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isogradient的音標：isogradient的英式發(fā)音音標為：[a?s??ɡ're?d??nt]isogradient的美式發(fā)音音標為：[a?so?ɡ're?d?rnt]...
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isograde的音標：isograde的英式發(fā)音音標為：[a?s??ɡ're?d]isograde的美式發(fā)音音標為：[a?so?ɡ're?d]...
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isograd的音標：isograd的英式發(fā)音音標為：[a?s??ɡ'r?d]isograd的美式發(fā)音音標為：[a?so?ɡ'r?d]...
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等梯度線...
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等變質(zhì)級...