The vase was quite fragile so we had to wrap it in soft material before we send it by post.
这个花瓶很易碎，所以我们在邮寄前必须用软材料把它包起来。
Thanks to Matt Gurney and National Post for covering this material.
由于这种材料覆盖到马特·格尼和国家邮报。
The material and design of root canal post has already been well investigated.
关于根管桩材料和设计的研究已日益成熟。
The material and design of root canal post has already been well investigated.
关于根管桩材料和设计的研究已日益成熟。
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