Gagatisation
腐植质浸染作用
🗣️ 情景例句
Can I help?
要我帮忙吗？
Until when?
借到什么时候？
With the invention of writing, a great advance was made, for knowledge could then be not only communicated but also stored.
随着书写的发明，又迈进了一大步，因为这样一来，知识不仅能交流，而且能储存了。