In practical terms, the lack of available time seems to be, and often is, a valid reason for why we cannot take something on.

在现实中，缺少时间似乎是，并且经常是我们不能做某事的正当理由。

youdao

In reality those 3 reasons are just spurious excuses, not valid reasons for doing something.

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Must be, otherwise no one could have a patent valid in 2012 for something that has been around since 1972.

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All of these are extremely valid points, and something for everyone to consider.

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