After all, there is no obvious reason why parents should choose to have only one child just because the Berlin Wall has come down.

不管怎么样，都没有理由说明仅仅因为柏林墙倒了，父母就应该选择生一个孩子。

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Pipe wall smooth formation, no bubbles, nicks and obvious scar patterns Depression, color and uneven discoloration decomposition line.

管材外壁光滑、平整、无气泡、裂口和明显痕纹凹陷、色泽不均及分解变色线。

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And no obvious stress concentration is observed around the back-connected support, which proofs that this new type stone curtain wall has good mechanical property.

背槽式锚固件附近没有明显的应力集中现象，表明这种新型锚固件受力效果良好。

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