形容詞 desultory:

1. marked by lack of definite plan or regularity or purpose; jumping from one thing to another

1. He broke into a desultory chat with me over his business affairs.
   他突然開(kāi)始和我漫無(wú)邊際地談起他的生意來(lái)了。

des.ul.to.ry

adj.（形容詞）
Moving or jumping from one thing to another; disconnected:
雜亂的，不連貫的：從一件事跳到另一件事；不連貫的：
例句：
a desultory speech.
說(shuō)話語(yǔ)無(wú)倫次

Occurring haphazardly; random.See Synonyms at chance
隨意的；任意的參見(jiàn) chance

來(lái)源：
Latin dôsultôrius [leaping]
拉丁語(yǔ) dôsultôrius [跳躍式的]
from dôsultor [a leaper]
源自 dôsultor [跳躍者]
from dôsilore dôsult- [to leap down]
源自 dôsilore dôsult- [跳下]
dô- [de-]
dô- [前綴]
salore [to jump] * see sel-
salore [跳躍] *參見(jiàn) sel-

【引伸】
des.ulto.rily
adv.（副詞）
des.ulto.riness
n.（名詞）