复数： infancies

The art of forecasting space weather is in its infancy .

宇宙天气状况的预测研究还仅在其初期阶段。

Boys are slightly more likely to die in infancy than girls .

在婴儿期男孩比女孩的自然死亡率要略高一点。

Luxury was a thing almost unknown in the days of my infancy .

我幼年不知奢侈是什么。

This trend , which we believe is still in its infancy , effectively began with retailers and travel providers such as airlines and hotels and will no doubt go further .

我们认为这种趋势仍处于幼儿期，它实际上由零售商和旅行提供商开始，比如航空公司和旅馆，而且毫无疑问能继续成长。

But the research is in its infancy .

但是这些研究仅限于它的初期。