名詞 aplomb:

1. great coolness and composure under strain
   同義詞：assuredness, cool, poise, sang-froid

1. She perform the duties of a princess with great aplomb.
   她泰然自若地履行王妃的職責(zé)。
2. She performs the duties of a princess with great aplomb.
   她泰然自若地履行王妃的職責(zé)。

a.plomb

n.（名詞）
Self-confident assurance; poise.See Synonyms at confidence
自信，沉著；泰然自若參見 confidence

來源：
French
法語
from Old French a plomb [perpendicularly]
源自 古法語 a plomb [垂直地]
a [according to] from Latin ad- * see ad-
a [關(guān)于] 源自 拉丁語 ad- *參見 ad-
plomb [lead weight] from Latin plumbum [lead]
plomb [鉛重] 源自 拉丁語 plumbum [鉛]