3. We improvised some shelves out of planks of wood and bricks. 我们用木板和砖头临时搭了些架子。
4. Over the top, he managed to draw together two or three bushes, and the improvised wigwam was complete. 在顶上,他成功地把两三丛灌木丛拉到一起,就这样,一个简易棚屋完成了。
5. We are not sure how well we can reproduce the melodies or rhythms, because they were apparently improvised in many cases. 我们不确定我们能多完整地重现旋律或节奏,因为它们显然在很多情况下是即兴创作的。