[译] 在失重的情况下，像吃和喝这样简单的动作都变得非常困难。
[误] When there is no gravity, simple acts, such as eating and drinking, become very difficult.

[正] When there is no gravity, simple actions, such as eating and drinking, become very difficult.
[注] 指具体的行为、行动，更多地使用 action，此时它是一个可数名词。