動詞 lack:

1. be without
   同義詞：miss, lack

形容詞 lacking:

1. not existing
   同義詞：missing, nonexistent, wanting
2. inadequate in amount or degree
   同義詞：deficient, wanting

1. Lacking animation, variety, or distinction; dull.
   無精打彩的，乏味的缺少生氣、變化或差別的; 乏味的
2. Money for the project is still lacking.
   進(jìn)行這個項(xiàng)目的錢還沒有著落。
3. She's not lacking in intelligence.
   她并不缺乏學(xué)識。
4. The girl always complains about lacking suitable raiment.
   這個女孩總是抱怨沒有合適的衣服。