然而

然而rán'ér，相反xiāngfǎn的de理论lǐlùn往往wǎngwǎng也yě是shì真的zhēnde。

And yet, the contrary is always true as well.

原yuán版bǎn很hěn好hǎo，然而rán'ér葡萄牙语Pútáoyáyǔ译文yìwén有yǒu误wù。

The original edition is great, but the Portuguese translation contains errors.

然而rán'ér，反fǎn命题mìngtí也yě总是zǒngshì正确zhèngquè的de。

However, the opposite is also always true.

然而rán'ér这zhè也yě算suàn不bù上shàng什么shénme像样xiàngyàng的de东西dōngxi。

But it isn't even worth calling stuff.