During decades of oppression, the people lost their will to resist and became ______, yielding readily to the government"s demands.

多项选择题Some ecosystems are more ______ than others, better able to withstand changes, while other ecosystems are more ______ and therefore susceptible to the slightest alteration.

多项选择题Believing that scientists should ______ the public about important scientific issues, marine ecologist Jane Lubchenco has urged the research community to abandon its usual ______ in favor of more effective communication.