very low birth rate
... birth-defect 释义：出生缺陷:初生检查所见先天缺陷 very low birth rate 释义：极低出生率 LBWI 释义：[=low-birth-weight-infant]低出生体重婴儿,出生低体重婴儿 ...
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但“长寿”现象对于日本来说也是个头疼事。 日本的出生率极低势必造成一小群劳动者养活很多老年人的局面，这将会导致未来出现人口危机。
But the longevity is also presenting a headache as the country has very low birthrate, spelling a future demographic crisis as a smaller pool of workers supports a mass of elderly.
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