形容詞 lengthy:

1. relatively long in duration; tediously protracted
   同義詞：drawn-out, extended, prolonged, protracted

1. He was wont to give lengthy speeches.
   他慣於做長(zhǎng)篇大論的演說(shuō)。
2. I was subjected to a lengthy inquisition into the state of my marriage and the size of my bank balance.
   有關(guān)方面就我的婚姻狀況以及銀行存款余額對(duì)我進(jìn)行了詳細(xì)的調(diào)查。
3. After much discussion/several lengthy discussions they decided to accept our offer.
   經(jīng)過(guò)反覆討論[多次長(zhǎng)時(shí)間的討論]，他們決定接受我們開(kāi)的價(jià)。
4. The problem was solved only after several lengthy discussions.
   那個(gè)問(wèn)題幾經(jīng)長(zhǎng)時(shí)間的討論才得以解決。
5. I was subjected to a lengthy inquisition into the state of my bank balance.
   有關(guān)方面就我的銀行存款余額對(duì)我進(jìn)行了詳細(xì)的調(diào)查。
6. Being or taking a roundabout, lengthy course.
   曲折的，迂回的處于或采用迂回的、冗長(zhǎng)的途徑

length.y

adj.（形容詞）
length.i.er,length.i.est
Of considerable length, especially in time; extended:
長(zhǎng)久的，漫長(zhǎng)的：擁有相當(dāng)長(zhǎng)度的，尤指在時(shí)間上；延長(zhǎng)的：
例句：
a lengthy convalescence.
漫長(zhǎng)的康復(fù)期

Tediously long; drawn-out:
冗長(zhǎng)乏味的；持續(xù)很久的：
例句：
a lengthy explanation.
冗長(zhǎng)乏味的講解

【引伸】
length.ily
adv.（副詞）
length.iness
n.（名詞）