通过对梨晶顶面稍斜的角度能看到这些生长纹，如图2所示。

These lines are seen by looking at a slightly oblique angle towards the top surface of the boule, as shown in Figure 2.

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和树木不同的是，当你以平行梨晶长端的视线角度观察时，将看不到任何生长线。

Unlike a tree, if one looks parallel to the length of the boule, no lines will be seen.

youdao

和树木不同的是，当你以平行梨晶长端的视线角度观察时，将看不到任何生长线。

Unlike a tree, if one looks parallel to the length of the boule, no lines will be seen.

youdao