英音 
[lɛŋkθ]
 
美音 
[leŋθ]

length 基本解释
n.长度，长；时间的长短；（语）音长；一段，一节

But the length of treatment depends on the problem .
但治疗时间的长度取决于问题本身。
At length he thought he had reached certainty of mind .
他想这么长的时间足可致心定了。
Apart from length , what is the difference ?
除了时间长短外，还有什么区别呢？
The interview has been edited for length and clarity .
以下采访的内容因篇幅和清晰度有所删改。
The flea can jump 350 times its body length .
跳蚤可以跳出它身长350倍的距离那么远。