维生素A补充剂不过就一两美元，但是其效益——预防重大疾病，提高终生收入¬——极为可观，穷人们应该赶紧行动起来。
Vitamin A supplements cost just a dollar or two. Their benefits—preservation from fatal diseases, higher lifetime earnings—so massively outweigh the tiny costs that poor people ought to snap them up.
维生素补充剂不能用于治疗或预防任何疾病。
Vitamin supplements are not intended to treat or prevent any disease.
维生素补充剂不能用于治疗或预防任何疾病。
Vitamin supplements are not intended to treat or prevent any disease.
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