重點(diǎn)講解：
1. buy up 大量買進(jìn)，全部買下（土地、房產(chǎn)或商品）；
The mention of price rises sent citizens out to their shops to buy up as much as they could.
物價(jià)上漲的說法使老百姓都涌進(jìn)商店大量搶購商品=vHwe_cwk!q,p_t。
2. ups and downs 興衰；浮沉；起落；悲歡；
We are bound to see some ups and downs along the road to recovery.
在經(jīng)濟(jì)復(fù)蘇的過程中，我們一定會經(jīng)歷一些曲折起伏~BUl,s9NQ9|jZRX。
3 pick up steam (信念、計(jì)劃、項(xiàng)目等)變得越來越重要，開始發(fā)展壯大；
Just as the presidential campaign was picking up steam, riots exploded in Los Angeles.
正當(dāng)總統(tǒng)競選活動的聲勢日益壯大時(shí)，洛杉磯爆發(fā)了暴亂3k8hdkOx2-wq*Z&Ng。
4. on the lookout for 密切留意；小心提防；
The public should be on the lookout for symptoms of the disease.
公眾應(yīng)當(dāng)留心這種疾病的癥狀)f[;@H6Z~^xDGAY。