assembled frog

例句：

1. 1. Theengineer assembled the new machine with great care.
   工程师仔细地组装了新机器。
2. 2. The scientistassembled a model of the solar system forhis presentation.
   科学家为他的演讲组装了一个太阳系的模型。
3. 3. The children assembled a tower outof blocks, building it step by step.
   孩子们用积木搭建了一个塔，一步步地建造起来。