1.rest with 在于
The superficial causes rest with wrong interpretation of needy culture and external social influences.
其表层原因在于对贫困文化的错误解读和外在的社会影响。

2.sweep through 席卷
Seasonal influenza spreads easily and can sweep through schools, nursing homes or businesses and towns.
季节性流感很容易传播，可席卷学校、疗养院或企业和城镇。

3.in times of 在...时期
In times of financial stringency it is clear that public expenditure has to be closely scrutinized.
财政紧缩时期显然要对公共支出进行严格审查。