Restricted materials
内部参考资料
🧩 词语组成解析
restricted
[ri'striktid]
adj. 有受限制的;（土地）对公众不完全开放的;保密的;
v. 限制( restrict的过去式);
materials
[[mə'tiəriəlz]]
n. 材料；材料费；材料科学；材质（material的复数）
🗣️ 情景例句
one of the best tennis players on the Michigan team--
当年Michigan球队最好的网球选手--
Some people sometimes ask me what is the secret of such a tremendous growth.
有时有人问我取得如此惊人增长的秘密是什么。
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。