ABBREVIATION for post-paid 邮资已付
These hypothesized functions for PPD are far from proved.
这些对于产后抑郁症作用的假设还远未得到证实。
The effects of crude oil properties, the structure of PPD and the testing conditions on pour point depression were discussed.
讨论了原油的性质、降凝剂的结构及试验条件对降凝效果的影响。
This "psychic pain hypothesis" cannot explain the whole story, however, because few parents suffering from PPD abandon their newborn.
不过这种“精神痛苦假说”并不能解释全部事情，因为抛弃孩子的产后抑郁父母很少。
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