You can solve the second issue — the ability to tie each object to an element in the stack of stacks data structure — with a filter as well.

过滤器还可以解决第二个问题——将每个对象关联到栈中栈数据结构中的一个元素。

youdao

This leads directly to the second issue, namely that when any options do need to be specified explicitly, it is likely that several of them will have to be specified.

这个问题也直接导致了第二个问题，即当任何选项需要被明确地指定时，它们中的几个都不得不被指定。

youdao

You could read issue 1 of Astonishing X-Men on your Mac at work, purchase the second issue with your iPhone on the train ride home, and then read it comfortably in bed with your iPad.

用户可以在工作时用Mac机阅读x战警第一期，用iPhone在回家的路上购买第二期，回到家后躺在床上用iPad阅读。

youdao

"And the second issue is that behind NATO they see the United States and U.S.power and they remain as convinced as in the past that it is in the U.S.

VOA: standard.2009.09.04

The second issue is that the gene vector, in this case the plasmid, has to be compatible with the cells that you're trying to express the gene in.

接下来的问题是如何选择合适的基因载体,在这里用到的,质粒,必须与要用来表达基因的,受体细胞匹配

耶鲁公开课 - 生物医学工程探索课程节选

The second issue,the second response is even more important.

第二点，更为重要的是。

哈佛公开课 - 幸福课课程节选

The second issue is reliability, the consistency with which a test measures an item.

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The second issue is also quite significant, but can likely be fixed with a firmware update.

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But it is the second issue--climate change--that is drawing the most attention these days.

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