A minute later he said, " this is stupid, I give up. "

After a few shot at guessing who does it, I give up.

到底是谁干的, 我猜了几次没猜著就不再猜了.

These questions are too hard for me. I give up.

这些问题对我来说太难了. 我放弃.

I give up; tell me what the answer is.

我认输, 告诉我答案吧.

A design of measuring system for I/ F convertor

I/F变换器测试系统设计

I f you can meet with Triumph and Disaster And treat those two imposters just the same;

假如你能&在遇到胜利和困难时态度同样平静；

Results: The amplitude of I f in Ad group was decreased ( p < 0 05).

MTT实验显示Ad.结果：腺苷组起搏离子流If幅值降低（P<0.05）；

I f he doesn't, you spend the night with me.

如果他没打，你就跟我过夜。

Air Bud I f* cking respect you for this...@ KEVINLOVE

我真的很尊敬你……@KEVINLOVE

Investment and financing ( I F) is the core of modern economy, there is a close relationship between I F and the development of urbanization.

投融资作为现代经济的核心，与城镇化发展之间存在着密切关系。

This paper introduces the development of I F research area, TRECs and what they had done on IF.

介绍了目前评估领域的发展情况，TREC会议及其在信息过滤领域做出的贡献。

Urbanization development needs adequate funding, balanced relationship between urbanization I F supply and demand, and efficient management of urbanization I F. They are conductive to promote the further development of urbanization.

城镇化发展需要充足的资金保障，均衡的城镇化投融资供求关系、高效的城镇化投融资使用及管理有利于进一步推动城镇化的发展。

Cardiac pacemaking is controlled by an inward current called I f, which is activated by membrane hyperpolarization of pacemaker cells in the sinoatrial node.

心脏的起搏受控于一类存在于心脏窦房结被称作If的离子通道，该通道是被细胞膜的超极化所激活。

Research on Static Test of I/ F Converter in IMU

惯导装置中I/F变换器静态测试方法研究

What the hell are you doing? I f you don't think they watch us in here, you're wrong! Hey. I'd put that down if I were you.

你到底在做什么你以为他们没有监视我们你就错了嘿如果我是你我会把它放下

Aim and Methods: By using two microelectrode voltage clamp technique, to observe the effects of adenosine ( Ad) on pacemaker current I f were examined in sheep cardiac Purkinje fibers.

目的和方法：用双微电极电压钳技术，观察腺苷（adenosine，Ad）对绵羊心室浦肯野纤维起搏离子流1f的影响。

Marcus: I feel terrible. I'm as sick as a dog.

马卡斯：我觉得很不对劲，我病得很厉害。

I feel terrible. We gotta do something.-Oh, yeah.

我觉得很愧疚我们得做点什么-是啊

I feel terrible, Miss Lounds.

很抱歉，劳兹女士。

Good morning, doctor walton, I feel terrible these days.

早上好，沃尔顿医生。这几天我感觉非常不舒服。

But I feel terrible.

我可感觉糟透了！