Meaning of 生/meaning-of-笑い in Japanese

赤ん坊は敵意のある笑いができるほど年をとってはいない。
The baby is not old enough to be capable of hostile laughter.

日本文化の文脈の中では当然と思われる微笑みも、外国人の間では、不気味な笑いとして多くの混乱を生み、また悪評が高い。
Our smile, which is understandable in the context of Japanese culture, sometimes causes a lot of confusion and is notorious among foreign people as a mysterious smile.

「ちがうちがう僕らは求めてる笑顔はあんなじゃない」　それは『嗤い』もしくは『嘲笑』。
"No, no! That isn't the smiling face we are looking for." It was a 'smirk' either that or a 'sneer'.

この川はあの川の３倍長い。
This river is three times longer than that one.

信濃川と阿賀野川ではどちらが長いですか。
Which is longer, the Shinano River or the Agano River?

アメリカ人にはよくあることだが彼はなまの魚を好かない。
As is often the case with Americans, he does not care for raw fish.

静岡産のお茶と宇治産のお茶では何が違いますか。
Is there any difference between the tea from Shizuoka and that from Uzi?