EnglishGermanSpanishFrenchItalianPortugueseThaiVietnameseSimpl. Chinese Trad. Chinese

---

---

---

---

CEFR OX3000
rất cần thiết, không thể thiếu

---

---

---

exact:

---

---

VNDE rất cần thiết, không thể thiếu * * unentbehrlich

---

---

Composite Words *
Advanced *

---

---

Oxford3000Ten

---

Tatoeba