Smokers who inhale are likely to become addicted to nicotine.是什么意思？

Smokers who inhale are likely to become addicted to nicotine.

吸烟的人容易对尼古丁上瘾.

Smokers

n. 吸烟者( smoker的名词复数 )；

例句
In one study, light smokers were found to be more than twice as likely to get cataracts as non-smokers...
研究表明，即使抽烟不多的人也比不抽烟的人患白内障的概率高出一倍多。

who

pron. 谁，什么人，关系代词，有先行词，孰；

例句
The last French king was Louis Philippe, who abdicated in 1848.
法国末代国王是1848年逊位的路易·菲力普。

inhale

vt.& vi. 吸入，〈非〉狼吞虎咽，吸气；

例句
Don't inhale dust into your lung.
别把灰尘吸进肺里.

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

likely

adj. 可能的，适合的，有希望的；adv. 可能，或许，大概，多半；

例句
The threat is likely to remain in abeyance until next year's meeting in Reykjavik.
这一威胁很可能会一直存在下去，直至明年的雷克雅未克会议。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

become

vi. 变为，成为，变得，变成；vt. 适合，适宜，相称，相当，变成，发生；

例句
...abandoned buildings that become a breeding ground for crime.
沦为了犯罪温床的弃置楼群

addicted

adj. 上瘾的，沉迷于某种嗜好的；vt. 使…上瘾(addict的过去分词)；

例句
Many of the women are addicted to heroin and cocaine...
这些女人中很多人都吸食海洛因和可卡因成瘾了。

nicotine

n. 尼古丁，[化]烟碱；

例句
Both nicotine and carbon monoxide inhaled with cigarette smoking have been incriminated as causative factors.
抽烟时吸入的尼古丁和一氧化碳都已经被标定为致病因素。