And if a molecule cannot cross the barrier, it will not make an effective neurological treatment.
不能通过屏障进入脑的分子当然就无法完成有效的神经治疗。
If it cannot find a foreign key relationship between the tables, the default is a cross product.
如果查询编辑器在表之间找不到外键关系，则缺省设置为矢量积。
If charge cannot cross the interface, it is said to be polarized and is electrically equivalent to a capacitor.
如果电荷不能通过这种界面，它即是极性的，其电学行为等效一个电容。
And just to give you a sense, if you do a cross-cut of this, you cannot show it from this Angle, but it should really be sort of a dumbbell shape with the nodal plane in between the two nuclei.
告诉你们这些就是给你们点概念，假如你们把他横切切开，不能从角度上展示，但它还是会保留几分哑铃的形态，以及在两核之间的节面。
If our task is to cross a river, we cannot cross it without a bridge or a boat.
我们的任务是过河，但是没有桥或没有船就不能过。
See sammo hung cross-examine, no longer conceal, donnie yen sighed said: "a few days ago, my right arm is broken, it hasn't healed, cannot too firm."
见洪金宝追问，甄子丹不再隐瞒，叹了口气说：“前几天，我的右臂骨折了，到现在还没痊愈，不能过分用力。”
See sammo hung cross-examine, no longer conceal, donnie yen sighed said: "a few days ago, my right arm is broken, it hasn't healed, cannot too firm."
见洪金宝追问，甄子丹不再隐瞒，叹了口气说：“前几天，我的右臂骨折了，到现在还没痊愈，不能过分用力。”
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