叙述和对照现今药物取得的方法和构成它们施用范围的机制？

Describe and contrast the currently available drug delivery methods and the mechanisms underlying the scope of their application.

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但在全球范围内，因为费用大幅度上升，大量施用肥料的可能性微乎其微。

But globally there is little prospect of a big rise because of the expense.

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缺硼严重影响小麦的穗分化，在一定施硼范围内，随着硼施用量的增加，总小穗数和有效小穗数增多。

The application rates of boron greatly affected the spike differentiation of wheat. In a certain range, gross spikelets and available spikelets increased with the increasing rate of boron applied.

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