bbb
abbr.
bed, breakfast, and bath （提供）住宿;
basic boxed base 基本盒式底座;
beleaguered by bullets and burglars 遭到子弹和窃贼围攻;
triple black 三个B的（软铅）铅笔;
例句:
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The permeability of BBB was evaluated using Evans blue ( EB ).
用伊文氏蓝 ( EvansblueEB ) 示踪BBB通 透性的变化.
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BBB grade were no significant difference between groupand group.
、组脊髓损伤BBB评分差异无统计学意义.
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The BBB permeability was reflected by Evan's blue ( EB ) extravasation.
用Evan’sblue ( EB ) 测定BBB的通透性.
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Ratings of BBB- or higher are considered "investment grade".
来自BBC
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The BBB credit rating is just two notches higher than junk status.
来自WSJ
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Last month, Fitch Ratings upgraded the Philippines's long-term foreign-currency rating by one notch to BBB-minus.
来自WSJ