介绍:
Thread 线
Thread is made of cotton, silk, or man-made fibers such as nylon. It is chiefly used in sewing and weaving. Have you ever watched a spider weave its silk threads into a web strong enough to catch flies moths or mosquitoes？ It is so fascinating！
Thread is fine ，and easily broken. This helps you understand the expressions used in the following examples：
When a man's life is in very great danger， you can say his life hangs by a thread .
When there is a faint hope of success, you can say there is a thread of hope left.
线是用棉花、丝或像尼龙那样的人造纤维做的。它主要用于缝纫和编织。蜘蛛编丝成网，足以逮住苍蝇飞蛾和蚊子，你有没有看过呢？那真是神奇得很呐！
纤维细小而易断。这有助于你理解，用在下列例子中的词组：
当一个人的生命极其危险的时候，你可以说他的生命危在旦夕，千钧一发。
当存在微小的成功希望时，你可以说，还有一线希望。
