It appears a Ferrari has collided with a barrier in the tunnel.

一辆法拉利似乎和隧道中的障碍物发生了碰撞。

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Tryptophan has to fight with other amino acids to cross the blood-brain barrier and get into the brain.

色氨酸必须打败其他的氨基酸，才能通过血管-大脑的障碍物，到达大脑。

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The Wolf could see what the person was looking at only if it walked around the barrier.

狼只有绕到障碍物后方才能看见人所注视的东西。

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