1. 在…的支持下；在…的保护下；以…作后盾
Something that is done under the aegis of a person or organization is done with their official support and backing.

1. kindly endorsement and guidance

e.g. the tournament was held under the auspices of the city council

Synonym: auspicesprotection

2. armor plate that protects the chest
the front part of a cuirass

Synonym: breastplateegis