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笔墨纸砚是中国古代文人书房当中必备的宝贝，被称为“文房四宝”。用笔墨书写绘画在中国可追溯到五千年前。秦时已用不同硬度的毛和竹管制笔；汉代以人工制墨替代了天然墨；有了纸张以后，简牍锦帛逐失其用；砚台则随笔墨的使用而发展。 “文房四宝”到宋朝以后特指湖笔、徽墨、宣纸、端砚。可以说文房四宝书写了整个中华文明。

New graphene oxide aerogels with a reconfigured microstructure offer ultrahigh sensitivity and durability, paving the way for ...

In 2021, Elastic moved to closed source licenses after several years of conflict with Amazon’s cloud subsidiary AWS, which was selling its own managed version of Elasticsearch. While AWS was ...

That kind of integration happens to be a Java specialty. Even better for Java developers, the Spring framework has recently introduced Spring AI, which streamlines programming for a wide range of ...

Natural and human-made rubber can change its shape and come back again. Materials that can do this are called “elastic”. Elastic materials are useful in lots of ways: Similar to how tires and sneakers ...

Unlike other smart rings available today, the one described in Xiaomi's patent has a unique capability that allows it to automatically adjust its size to fit a user's finger. In order to enable the ...

which captures found objects with acrylic and neon elastic. She said it was her first time showing work near her hometown of Spring Lake, besides exhibitions she hosted in the South.

A major bonus: They have a sneaky elastic waistband for easy all-day wear. Throw the breezy pair on with your favorite sneakers and white tee, or dress it up with slingbacks (cough, cough see below) ...

Spring is the ideal time to visit many of the world's most popular vacation destinations. Before the peak summer crowds roll in, travelers can often find pleasant temperatures, fewer tourists and ...

4. Cultivate spring back sustainability. Think of yourself as an elastic band that bends and stretches to a certain point before you spring back higher than you fall. 5. Refer to previous experience.