1.even if 即使，纵然

They conference even if duke is out of the country.
即便是麦道克不在美国，他们也会举行会议9+Dg5]UKU|3Q,Y32。

And there are sensitivities around services that involve children--even if parents are involved.
此外某些涉及儿童的服务项目容易引起争议——即使父母参与也无济于事+bw.ffq.[P。

2.engage in 参加，从事

They engage in more high-risk activities than women.
他们比女人更多地从事高风险的活动j%BsX-I@^isGfvdd0fe。

They tempt you to engage in non-restful activities and keep you awake.
它们诱惑你从事不能休息的活动让你保持清醒9pN9F@yFT4u_。

3.react to 对…作出反应

Iran didn't immediately react to huawei's announcement.
伊朗没有立即对华为的声明做出反应&kL~#uM3W0h9mviBJzK。

So how would americans react to such a disaster?
那么美国人对这样的灾难会如何反应呢？