视频对话：
How do you think I feel?
你觉得我感觉如何？
I haven't slept.
我都没合过眼。
I feel sick, like there's something in my stomach, fluttering.
我觉得反胃，像有东西在我胃里搅。
Butterflies?
你芳心大动？
本期学习词汇：
flutter
vi.飘动；鼓翼
vt.& vi.振翼，拍翅膀；烦扰，坐立不安；（旗帜）飘扬
n.紧张，激动不安；颤振；飘扬；（身体部分的）病态阵跳
例句：
1. The look in his eyes made my heart flutter.
他的眼神让我心里扑通扑通直跳。
2. Her chiffon skirt was fluttering in the night breeze.
她的雪纺裙在晚风中飘动着。
3. The birds were active, whirring and fluttering among the trees.
鸟儿们很活跃，在树林中呼呼地飞来飞去。
4. She'd been fluttering about in the kitchen.
她一直在厨房里忙前忙后。
5. Flutter experiment is always the attention-getting topic in airplane flight test, because it directly affects the flight safety.
颤振试验历来是飞机试飞中最受关注的课题，因为它直接影响飞行安全。