to investigate or examine something
调查或检查某事 (diàochá huò jiǎnchá mǒu shì)
"They promised to look into the billing error today."
"他们承诺今天调查账单错误。" (Tāmen chéngnuò jīntiān diàochá zhàngdān cuòwù.)
a situation in which something has suddenly failed or collap...
being examined very closely
to be in a difficult situation requiring careful balance
a change in leadership or authority
a person who wakes up or arrives early
to be extremely happy