敞开型伸缩缝

A、敞开型伸缩缝(open joints) 敞开型伸缩缝，容许水及杂物通过伸缩缝。 B、封闭型伸缩缝(Closed Joints) 封闭型伸缩缝，水及杂物均不能通过伸缩缝。

Modern large-mouthed snakes, such as boas and anacondas, can eat large prey because their jaw joints are positioned well behind their skulls, allowing the snakes to open their mouths very wide.

现代阔口蛇，像蟒蛇和水蟒，能吃大的猎物是因为它们的颌关节恰位于头骨的后面，能使蛇的嘴张得非常宽。

Unlike modern snakes, s. indicus lacked jaw joints that allowed it to open its mouth incredibly wide, so it relied on its large overall body size to prey on the fledgling dinosaurs.

有别于现代蛇类，Sanajeh indicus蛇不具备让它血口大张的颌骨关节，所以只能依靠其庞大身躯来猎食恐龙幼仔。

The world number two first experienced intense pain in his joints back in June before the US Open got underway at Pebble Beach.

这个世界第二的球手第一次遭遇关节剧烈疼痛时在六月份的时候，在圆石滩美国公开赛之前。