onset
the beginning of something, especially something bad
例句: Evidence shows that speaking a second language can help delay the onset of dementia.
1）翻译下面的句子：
经济危机爆发后，投资面貌发生了巨大变化。
After the onset of the financial crisis, the investment landscape has been changed.
参考翻译：The investment landscape has been changed tremendously since the onset of the financial crisis.
2）场景：他一受到感染就去看医生了。
造句：He went to see the doctor at the onset of the infection.
