The picture illustrates the changes in cutting tools between
Tool
A as a cutting Use synonyms
tool
1.4 Use synonyms
million
Use synonyms
years
ago and Use synonyms
Tool
B as a cutting Use synonyms
tool
0.8 Use synonyms
million
Use synonyms
years
ago.
In general, these tools had some significant changes Use synonyms
due to
their appearance, But regarding the height, Linking Words
tool
A and Use synonyms
tool
B stayed at the same size which is 5cm.
1.4 Use synonyms
million
Use synonyms
years
ago, the cutting Use synonyms
tool
seemed like a basic shape following the shape of the original stone. Use synonyms
Tool
A's front and back views seemed like rough textures, whilst the wide was Use synonyms
also
quite bold. The tip of Linking Words
this
Linking Words
tool
looked not sharp enough.
After 0.6 Use synonyms
million
Use synonyms
years
, the cutting Use synonyms
tool
has developed its appearance and its function has become better. Use synonyms
Tool
B’s texture looked smooth and its width was slimmer. Use synonyms
Moreover
, the back texture had a different texture from the front side, it could be following the shape of the user's hand, and the tip was Linking Words
also
sharper, by Linking Words
then
Linking Words
this
Linking Words
tool
was more comfortable and effective to use as a cutting Use synonyms
tool
.Use synonyms
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