Their price depended almost entirely on their scarcity.是什么意思？

Their price depended almost entirely on their scarcity.

它们的价格几乎完全取决于它们的稀有程度。

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

price

n. 价格，价钱，代价，价值，赏金；vt. 标价，定价，问…的价格，给…定价；

例句
There is at last an apparent end to the destructive price war.
这场惨烈的价格战貌似终于结束了。

depended

v. 依靠( depend的过去式和过去分词 )，依赖，信赖，决定于；

例句
I depended on his companionship and on his judgment...
我信赖他的友情，也相信他的判断。

almost

adv. 几乎，差不多，将近，快要，近乎；

例句
Despite considerable pain she has been getting out and about almost as normal...
尽管还很痛，她已经基本上行动如常。

entirely

adv. 完全地，完整地，全部地，彻底地；

例句
I say 'boys' advisedly because we are talking almost entirely about male behaviour...
我特意说成“男孩们”因为我们几乎一直在讨论男性的行为。

on

prep. （表示方向）向，（表示对象）对，（表示位置）在…上，（表示时间）在…之时；adv. （放，穿，连接）上，向前，（继续）下去；adj. 活动着的情况，状态，使用着的，发生着的，计划中的；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

scarcity

n. 不足，缺乏，稀少，萧条；

例句
This scarcity is inevitable in less developed countries.
这一匮乏在欠发达国家不可避免。