These numerous examples of cross-reactions raise another question: why does Bet v1 cause an allergy to the Mal d 1 protein but not the other way around?
这么多交叉反应的例子提出了另一个问题：为什么Bet v 1会导致对Mal d 1蛋白质的过敏，反过来Mal d 1却不会导致Bet v 1过敏？
2
The prepend-v styles, where v is 1 through 23, prepend v columns and v-1 gutters worth of pixels, using padding-left.
prepend-v 样式，其中 v 的范围是从 1 到 23，用于使用 padding-left 为 v 列和 v-1 分隔线预留足够的像素。
3
v. 1 Believe in Him that He is listening and watching and respond in love.