。。
We've taken a hit. Damage is minor.
Literal
Hit-received. Damage [topic-は] slight [copula-です].
被弾 'taking a hit' — 被 'to receive' + 弾 'bullet/shell.' ダメージ is a loanword from English 'damage.' 軽微 'slight, minor' is a formal Sino-Japanese adjective. The clipped, report-style delivery sounds like a military or sci-fi crew communication — a damage report to the bridge.