Bsf
abbr. backscatter factor 背（向）散射因素; beta-s-fetoprotein β-S-胎蛋白; bulk shielding facilities 整体屏蔽设备（反应堆）
🗣️ 情景例句
The plan is a simple one.
计划很简单。
We guarantee quality products which can stand fierce competition.
我们保证提供能经得起激烈竞争的高质量产品。
Hay had been cut and cowsheds had been cleaned.
干草已切好，牛棚也打扫干净了。