Safeguard (pp. & pt. safeguarded)
n.保护，保卫；防护措施；安全设施
vt.保护，保卫；防护

They are taking precautionary measures to safeguard their forces from the effects of chemical weapons.
他们正采取预防措施保护其军队免受化学武器的伤害。
Many people took second jobs as a safeguard against unemployment...
许多人为防失业都干两份工作。
A system like ours lacks adequate safeguards for civil liberties.
我们这样的制度缺乏有效保护公民自由的条款。

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Symmetry
n.对称；对称美；整齐，匀称

I loved the house because it had perfect symmetry...
我喜欢这所房子，因为它非常对称。
The superpowers pledged to maintain symmetry in their arms shipments.
超级大国承诺在武器运输方面要保持数量均衡。
He said that Britain would not rejoin the ERM 'until there is much greater symmetry between our economy and other European economies.'
他说在英国经济与其他欧洲国家的经济实现更大的趋同性之前，英国不会重新加入欧洲汇率机制。

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Infectious
adj.传染的；有传染性的；易传染的；有感染力的

These viruses affect children and are highly infectious.
这些病毒会侵袭儿童，而且具有很强的传染性。
She radiates an infectious enthusiasm for everything she does...
她做任何事情都充满一种极富感染力的热情。

剧情百科

好吧，Janine的出现不仅让John很惊讶！也让我惊讶了。但更让我惊讶的是，Janine居然成了Sherlock的女朋友，难道说，伴郎和伴娘真得有一腿？咳咳....我想多了。Sherlock是不会做无谓的事情的。那么他为什么要结识并与Janine交往呢？

考考你 Q&A
Q: Please use the word or phrase you just learnt to complete the sentence beblow.

1.Forster established the essentiality of minerals as _____ food factors required for maintaining life.
福斯特证实了矿物质作为辅助食物因子在维持生命方面的重要性。
2.Good traders seem to produce a lot of hormones, but only _____ _____ periods of time.
好的交易员体内似乎是会分泌较多的激素，但情况只限于在短时间内。

A:本期答案见下期
上期答案：

1.My conception of a garden was based on gardens I had visited in England...
我对花园的概念是基于我在英格兰观赏过的花园。
2.In a sense he invited germany's call for political integration by publicly pushing for joint eurobonds.
从某种意义上来说正是他公开地推动欧洲联合债权才让德国提出政治统一的。