Oral practice:3）食品药剂师将研究市场上销售的保健品，看看它是否具有所说的保健功能。Food chemists will investigatethehealthfood on saletoseeifit really does give the benefitsclaimed
Food chemists will investigate the health food on sale to see if it really does give the benefits claimed. 3) 食品药剂师将研究市场上销售的保 健品，看看它是否具有所说的保健 功能。 Oral practice:
Oral practice:4）事后看来，在该市开一家新的数据处理中心的时机不适合。In retrospect, it was the wrongtime to open a new dataprocessing centerinthis city
In retrospect, it was the wrong time to open a new data processing center in this city. 4) 事后看来，在该市开一家新的数据处 理中心的时机不适合。 Oral practice:
Oral practice:5）我对这条新闻的第一反应是宽慰，但后来细想想，我开始感到生气了。My initial reaction to the news wasrelief, but as I thoughtmore aboutitIbeganto feel angry
My initial reaction to the news was relief, but as I thought more about it I began to feel angry. 5) 我对这条新闻的第一反应是宽慰，但 后来细想想，我开始感到生气了。 Oral practice:
Oral practice:6）对数学的充分理解足以解释多种多样的自然现象Afullunderstanding of mathematicsis sufficient to explain a widevariety ofnatural phenomena
A full understanding of mathematics is sufficient to explain a wide variety of natural phenomena. 6) 对数学的充分理解足以解释多种多样 的自然现象. Oral practice:
Oral practice:7）在投递之前要确保将标签紧紧地贴在包裹上，Make sure the label isfirmlyattachedtotheparcelbeforeyou mailit
Make sure the label is firmly attached to the parcel before you mail it. 7) 在投递之前要确保将标签紧紧地贴在 包裹上. Oral practice: