大多数榫头除了在长边方向有榫肩，在两个短边方向也有榫肩。
Most tenons also have shoulder cuts on the top and bottom edges.
他还说，一般这个过程短的持续几分钟，长的几个小时也有，所以耐心很重要。
This may take a few minutes or it may take several hours; patience is essential, he added.
我写过的故事有30秒那么短的，也有30分钟那么长的。
I 've written stories as short as 30 seconds, and as long as 30 minutes.
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