Ureaphil
尿素注射劑
??? 情景例句
What's wrong?
怎么了？
I can't be sure of my future plans.
我還沒有明白地定下我將來的計劃。
With the invention of writing, a great advance was made, for knowledge could then be not only communicated but also stored.
隨著書寫的發(fā)明，又邁進(jìn)了一大步，因為這樣一來，知識不僅能交流，而且能儲存了。