"One of things we worry about is mega cities could produce, at some point, a mega disaster," he said.

“我们最担心的事情是大城市有可能，在某个时刻，发生特大的灾难，”他说。

youdao

"One of things we worry about is mega cities could produce, at some point, a mega disaster," he said.

“我们最担心的事情是大城市有可能，在某个时刻，发生特大的灾难，”他说。

youdao