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1.undergoing 经历
This powerful drug is used to tranquilize patients undergoing surgery.
这种强效药剂被用来麻醉手术病人。
2.temperatures 温度
The material requires higher temperatures and pressures to set hard.
这种材料需要有更高的温度和压力才能凝结变硬。
3.seafloor 海底
Abundant data and samples have been recovered by ocean drilling for studying the seafloor hydrothermal activity.
大洋钻探为海底热液活动研究提供了大量数据资料和样品。
4.seasonal 季节性的
Farm work is seasonal, so we must race against time.
农活有季节性，必须抢时间。
5.The research represents new evidence of the major climate changes Earth has experienced in the past - and is currently undergoing today.
climate changes 气候变化
If climate changes continue, we will suffer the consequences.
如果气候变化继续下去，我们将自食其果。
These animals became extinct because of climate changes and human activities.
由于气候变化和人类活动，这些动物逐渐灭绝了。
6.The research represents new evidence of the major climate changes Earth has experienced in the past - and is currently undergoing today.
in the past 过去
We did an analysis of the way that government money has been spent in the past.
我们分析了政府资金过去的使用情况。
The incidence of this disease has dropped considerably in the past few years.
近几年这种病的发病率大大降低了。
