B4用户选择一本书。
但是，对于页面b4呢？
B4 selection First selection Last selection.
B4选择第一次选择最后一次选择。
For specification information on, see Appendix B4.
有关的规范信息，请参阅附录B4。
The application consists of four pages: b1, b2, b3, and b4.
该应用程序由4个页面组成：b1、b2、b3和b4。
U might not have fallen in love B4, and not believe in eternal love.
你可能还没有爱过，所以你不相信这世界上有永远的爱情。
Anti-CD19 B4 antibodies with modified variable regions are disclosed.
本发明公开了具有改变的可变区的抗cd 19B4抗体。
In step B4, we need to select a book from a list returned from the system.
在步骤B4，我们需要从系统返回的目录中选择一本书。
No double-labeled neuron was found in B4, B6 and B8-9 cell groups at all.
而在其他细胞群即B4，B6和B8-9细胞组，未观察到双重标记神经元。
When K2-B4's animation model was created, the Lakers won the championship.
在K2-B4的动画模型被创造出来的时候，湖人队赢得了冠军。
This is the industry standard for broadcast cameras and it has a standard B4 lens mount.
这是广播相机行业标准，它有一个标准的三烯B4镜头卡口。
B4 has two possible previous pages, b2 and b3, depending on the forward path the user took to reach it.
b4有两个可能的前页b2和b3，这取决于用户采用哪条前进路径到达页面b4。
I know a lot of young kids use weird spellings like "b4" instead of "before." but if you notice, it's only those young kids who do that.
我知道很多小盆友喜欢用一些代替的词，比如用“b4”代替“before”，但是你有没发现，只有那些小盆友才会这么做。
Methods 5- LO products, leukotriene B4 (LTB4) and 5 hydroxyeicosatetraenoic(5-HETE), we re determined by RP-HPLC to represent 5-LO activity.
方法采用反相高效液相色谱法检测5-脂氧合酶产物——白三烯B4和5-羟花生四烯酸量的变化来反映该酶活性的改变。
Objective To determine whether leukotriene B4 (LTB4) could directly stimulate human osteoclast differentiation and activation independent of RANKL (ODF).
目的探讨白三烯（LT）B4能否不依赖细胞核因子资B受体激活剂配体（RANKL）直接促进人破骨细胞的分化和激活。
The article has introduced the gas geologic features in B4 Coal Seam in Fengcheng Colliery and analyzed the correlation factors of gas occurrence regularity.
本文简要叙述了丰城矿区B4煤层瓦斯地质特征，分析了瓦斯赋存规律相关因素。
Objective To explore the role of leukotriene B4 in the pathogenesis of chronic urticaria and the anti-inflammation activity of mizolastine in treating chronic urticaria.
目的探讨白三烯B4在慢性荨麻疹发病中的意义及咪唑斯汀在治疗慢性荨麻疹中的抗炎作用。
The separated (B4) oil can thus be collected from the relatively ice-free water surface (WL1) with an oil collecting device (200), which may have for example a brush skimmer.
因此能从相对无冰的水面(WL1)上利用油收集装置(200)来收集分离出的油(b4)，该油收集装置可例如具有刷式撇油器。
It can be likened to a rebus, which uses pictures and single letters, or numbers to represent whole words (e.g, "i <3 u" means “I love you”, b4 means before, lol means laugh out loud, etc. ).
这种短信文是由图片、字母或数字的组合来代表某个单词的，感觉像字谜一样。比如："i <3u"就代表“我爱你”（中间的<3像是一颗心的形状，代表“爱”），b4就是before（以前）这个单词的缩写形式，而lol则是laugh outloud（大声笑出来）这三个单词的缩写。
It can be likened to a rebus, which uses pictures and single letters, or numbers to represent whole words (e.g, "i <3 u" means “I love you”, b4 means before, lol means laugh out loud, etc. ).
这种短信文是由图片、字母或数字的组合来代表某个单词的，感觉像字谜一样。比如："i <3u"就代表“我爱你”（中间的<3像是一颗心的形状，代表“爱”），b4就是before（以前）这个单词的缩写形式，而lol则是laugh outloud（大声笑出来）这三个单词的缩写。
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