我们不能想当然地认为她有罪.We can't just assume her guilt.我们不能凭想当然办事.We must not act on assumptions.所有细节都应仔细核实, 任何事都不能想当然.All particulars should be carefully checked and verified; nothing should be taken for granted....

“想当然”的拼音为：xiǎng dāng rán...

“想当然”的英语可以翻译为：think it is so -- most probably it did not actually happen，assume sth. as a matter of course，take for granted ...