1. There was nervous tittering in the studio audience. 演播室观众席中传来紧张的窃笑声。
2. I couldn't really help it when toothers did, ' apologized Tess, still tittering. “大家都笑，我也实在忍不住了，”苔丝向她道歉说，嘴里还在嗤嗤地笑着。
3. Only the shiver of wind in the trees and the tittering of rain on the thatched roof broke that eerie silence. 只有窗外风吹拂过树的沙沙声和雨点落在屋顶上的滴答声打破了这诡异的安宁。
4. Results 500?fold enrichments were observed by tittering phages in the cell lysate after five rounds of selection. 结果经过5轮筛选，细胞裂解液中洗脱出噬菌体效价有500倍以上增长；
5. But he seemed not to hear. Only the shiver of wind in the trees and the tittering of rain on the thatched roof broke that eerie silence. 但是他好像并没有听到。只有窗外风吹拂过树的沙沙声和雨点落在屋顶上的滴答声打破了这诡异的安宁。
