against us负债againstprep.反对；逆；违背；倚靠；映衬；防御；相比；相对against domestic violence反家庭暴力against running instrument防跑偏装置against static electricity防静电against one's understandingagainst to all expectations出乎意料; 与预料相反against the letter of credit[经] 依据信用证against-the-car earphone耳挂式耳机against-the-ear earphone耳挂式耳机against the ear type earphone触耳式耳机against my better judgment.与我的判断相反

1. We have taken necessary precautions against fire.
   我们已采取必要的防火措施。
2. Give an eye to the fire while I'm out.
   我出去时要注意防火。