墨西哥钝口螈在墨西哥已经濒临灭绝，这是由于栖息地的减少和人类的捕杀。它们被当成是珍馐佳肴，就像是法国人喜欢吃的青蛙腿。
Ambystoma mexicanum is almost extinct in Mexico due to diminishing habitats and human hunting - they are regarded as a delicacy in much the way the French like frogs legs.
也许关于海胆，人们知道得最多的是它们的棘刺盔甲。但是，它们的口器可能更令人望而生畏——毫不夸张地说，海胆的牙齿可以把岩石咬碎，却永远不会变钝。
Sea urchins are perhaps best known for their armor of spines. But their mouths may be even more daunting-urchin teeth can literally chew through stone without getting dull.
在墙上钉几个磁性支架来存放刀具是个不错的方法，既方便取用，又能把刀具跟其他物品分开，免得磕磕碰碰地弄钝弄花了刀刃。
A magnetic holder screwed to the wall is a practical way of keeping knives always within reach and isolated from other objects that could dull and dent the blades by knocking against them.
但是，它们的口器可能更令人望而生畏——毫不夸张地说，海胆的牙齿可以把岩石咬碎，却永远不会变钝。
But their mouths may be even more daunting-urchin teeth can literally chew through stone without getting dull.
筷子地末端或圆或方，尖端则可以钝些也可以尖锐点。
The ends of chopsticks can be rounded or squared, while the tips can be blunt or sharp.
墨西哥钝口螈在墨西哥已经濒临灭绝，这是由于栖息地的减少和人类的捕杀。它们被当成是珍馐佳肴，就像是法国人喜欢吃的青蛙腿。
Ambystoma a mexicanum is almost extinct in Mexico due to diminishing habitats and humanhunting - they are regarded as a delicacy in much the way the French like frogs legs.
与头部的尺寸相称，三角形，耳尖略钝，保持直立。位置高且距离很宽，柔和地融入头部。
Ears should conform to head size and be triangular, slightly blunt-tipped, held erect, set on high yet well apart, and blend softly with the head.
例如，如果某刀片变钝，不能正确地切除管筒的末端，密封的边线就会很粗糙。
For example, if a knife becomes blunt and can no longer cut off the ends of the tubes correctly, the seal will be left with rough edges.
例如，如果某刀片变钝，不能正确地切除管筒的末端，密封的边线就会很粗糙。
For example, if a knife becomes blunt and can no longer cut off the ends of the tubes correctly, the seal will be left with rough edges.
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