1.Every year, millions of people descend on protected and pristine natural areas to observe rare species.
descend on袭击,突然访问
Visitors descended on us at Christmas.
圣诞节时我们家来了不速之客 。
2.They pointed to a recent event where sea turtles in Costa Rica had problems laying their eggs because of the hordes of tourists who had congregated to watch the turtles' nesting habits.
point to表明,指出
High interest rates do not point to a buoyant market this year.
今年的高利率并不表明市场繁荣 。
3.The report said it was essential, "to develop a more comprehensive understanding of how different species in different situations respond to human visitation and under what precise conditions human exposure might put them at risk."
respond to对…作出反应
We must respond to well-founded criticism with a willingness to change.
对于有根有据的批评,我们必须乐意作出改变 。