19a sail! A veil a wave upon the waves.
19帆船！面纱随着波涛起伏。
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19a third reason is that learning Chinese is, simply, a challenge.
简单地说，第三个原因是学习汉语本身就是一个挑战。
The coding and results of each of these aggregate APIs are shown in Figures 19a and 19b.
这个合计api的编码和结果如图19a和19b所示。
And there is already evidence that 19A is being impacted just as the other strains were.
FORBES: A Vaccine Eliminated A Deadly Killer Of Infants. So Why Do Some People Fear It?
In 2010, Pfizer introduced a new Prevnar vaccine, called Prevnar 13, that includes 19A and many of those strains.
The graphs below paint a clear picture of how the rise of 19A is overwhelmingly outweighed by the decrease in pneumococcal disease.
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