You see the sentences look very similar but of course they are not because this one is taking the antecedent as the second premise and this one is taking the consequence as the second premise.

你们明白句子看起来非常像，但是他们不是，因为这个有先行词，作为第二个前提，这个用结论，作为第二个前提。

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They had to look at two very similar black and grey pictures and say which one had a lighter spot.

他们要看两张非常相似的黑色和灰色的图片，说哪一个地方有一个较浅的斑点。

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I often mistake Wang Hai for his twin brother because they look so similar / very much alike.

我常把王海误认为他的双胞胎弟弟，因为他们长得太像了。

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Flannery O'Connor's work raises questions of a similar kind, but they look very different.

弗兰纳里，奥康纳的作品提出了,相似的问题，但是它们看起来不一样。

耶鲁公开课 - 1945年后的美国小说课程节选

Because if they are reared by the same parents,one could argue, "Well they came out very similar because same environment: they look the same; they go to the same schools; " same parents,and so on."

因为如果他们由相同的父母抚养，人们会说，“他们这么相似，是因为有同样的成长环境：,他们外表一模一样，上一样的学校;,有同样的父母，等等“

哈佛公开课 - 幸福课课程节选

They also look very similar to the simulations coming out of Piomas (Pan-Arctic Ice-Ocean Modelling and Assimilation System), an influential computer model that has been used to estimate Arctic sea-ice volume and which has been the basis for several predictions about when summer sea ice might disappear completely.

BBC: Cryosat spots Arctic sea-ice loss in autumn

These cells were also created using mouse cells, starting with mouse skin cells, and the comparison between what you get from a mouse cell that's transformed this way and an embryonic stem cell, they look to be very similar.

NPR: Scientists Create Embryonic Stem Cells from Skin

The weekend and the week look very similar: They are focused on creating the life they want.

FORBES: 14 Things Successful People Do On Weekends