She reckons it's going to rain later today.

她认为今天晚些时候会下雨。

She reckons that the project will be completed by next week.

她认为项目将在下周完成。

She reckons doing away with one child a week. Anything less than that and she becomes grumpy.

她盘算着一个星期弄死一个。否则，她就会变得气急败坏。