lightening
柯林斯词典
1. N the sensation, experienced by many women late in pregnancy when the head of the fetus enters the pelvis, of a reduction in pressure on the diaphragm, making it easier to breathe 胎兒下降感; 許多女性在懷孕晚期經歷的胎兒頭部進入骨盆的感覺[obstetrics]
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