Gold is traditionally a hedge against inflation.是什么意思？

Gold is traditionally a hedge against inflation.

购买黄金是防范通货膨胀的一种传统手段。

gold

n. 金，黄金，金色，金币，金饰品；adj. 金（制）的，含金的，金色的，金本位的；

例句
We used shades of gold and green to give the room a fresh, autumnal look.
我们用金色和绿色的色调为房间平添了一种清爽的秋日感觉。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

traditionally

adv. 传统上，传说上；

例句
Appraisal has traditionally been seen as most applicable to those in management and supervisory positions...
传统上认为业绩评定最适用于那些身处管理和监督职位之人。

hedge

n. 树篱，保护手段，防止损失（尤指金钱）的手段；vt. 用树篱围起，受…的束缚；vt.& vi. 回避，避免；adj. 树篱下的，树篱旁的，偷偷摸摸的，名声不好的，低劣的；

例句
The garden is surrounded by a hedge in which many small creatures can live...
花园四周是树篱，许多小动物可以在那里栖身。

against

prep. 反对，对…不利，紧靠，以防；

例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

inflation

n. 膨胀，通货膨胀，夸张，自命不凡；

例句
The rate of inflation is running at about 2.7 percent.
通货膨胀率大约为2.7%。