That famous book has twenty-nine versions. ☊ 
Cuốn sách nổi tiếng đó có hai mươi chín phiên bản. ☊ Abstract Objects 1 A day has twenty-four hours. Một ngày có hai mươi bốn tiếng. * 010 What? Only twenty kilos? Sao, hai mươi kilô thôi ư? * 037 like: hai mươi → →
zwanzig ☊ hai mươi ☊ 
二十 ☊ èrshí einundzwanzig ☊ hai mươi mốt ☊ 二十一 ☊ èrshí yī zweiundzwanzig ☊ hai mươi hai ☊ 二十二 ☊ èrshí èr dreiundzwanzig ☊ hai mươi ba ☊ 二十三 ☊ èrshí sān vierundzwanzig ☊ hai mươi bốn ☊ 二十四 ☊ èrshí sì zwanzig ☊ hai mươi ☊ ☊ einundzwanzig ☊ hai mươi mốt ☊ ☊ zweiundzwanzig ☊ hai mươi hai ☊ ☊ dreiundzwanzig ☊ hai mươi ba ☊ ☊ vierundzwanzig ☊ hai mươi bốn ☊ ☊ Hallo! Ich heiße Tri. Ich bin dreiundzwanzig Jahre alt. ☊ Xin chào. Anh là Tri. Anh hai mươi ba tuối. ☊ (Lektion 1, Nr. 2) Drei fünfundzwanzig bitte. ☊ Ba euro hai mươi lăm cent. ☊ (Lektion 4, Nr. 38) Ich war etwa zwanzig Mal verlobt und war am Ende nur einmal verheiratet. ☊ Tôi đã đính hôn khoảng hai mươi lần nhưng cuối cùng chỉ có cưới một lần. ☊ (Lektion 41, Nr. 590) The room measures fifteen feet by twenty feet. ☊ by ☊
Over twenty prisoners were crushed into a small dark cell. ☊ crush ☊
He's in his early twenties. ☊ early ☊
He finally won his freedom after twenty years in jail. ☊ freedom ☊
hurry sb: I don't want to hurry you but we close in twenty minutes. ☊ hurry ☊
I'd been waiting for twenty minutes and I was getting impatient. ☊ impatient ☊
She kept a diary for over twenty years. ☊ keep ☊
The flight leaves in twenty minutes—we'll never make it. ☊ make it ☊
There's a bus at twenty minutes past the hour (= at 1.20, 2.20, etc.). ☊ past ☊
pick sb/sth: Pick a number from one to twenty. ☊ pick ☊
I was twenty years old and ready for anything. ☊ ready ☊
The remaining twenty patients were transferred to another hospital. ☊ remaining ☊
We have lived in the same house for twenty years. ☊ same ☊
It's twenty years since I've seen her. ☊ since ☊
There were twenty or so (= about twenty) people there. ☊ ... or so ☊
There were fewer than twenty people there. ☊ than ☊
I've been waiting (for) twenty minutes. ☊ wait ☊