They are also easier to cache and easier to reconstruct after a crash. But they also can take more space.

而且定长表更加容易缓存与崩溃后重建，当然它会更消耗一些空间。

youdao

Let's calculate the average emission per passenger. Remember that since business class and first-class usually take more space, their CO2 emissions are higher than that of economy class.

计算基于飞机中乘客的平均排放，实际上由于公务舱和头等舱占有更大空间，因此排放应高于经济舱。

youdao

Let's calculate the average emission per passenger. Remember that since business class and first-class usually take more space, their CO2 emissions are higher than that of economy class.

计算基于飞机中乘客的平均排放，实际上由于公务舱和头等舱占有更大空间，因此排放应高于经济舱。

youdao