| 1. | Starch yields a blue color in the presence of iodine .
有碘存在时，淀粉即呈蓝色。 |
| 2. | He signed his name in the presence of two witnesses .
他当着两个证人的面鉴了名子。 |
| 3. | Speak out in the presence of everyone .
当着大家谈。 |
| 4. | I am deferential and respectful in the presence of artists .
我一向恭敬、尊重艺术家。 |
| 5. | John lost his speech in the presence of strangers .
在生人面前，约翰一句话也说不出来。 |
| 6. | He made the accusation in the presence of witnesses .
他在有见证人在场的情况下提出了控告。 |
| 7. | In the presence of a strong field the saturation effects are local .
在强场下饱和效应是局部的。 |
| 8. | The little girl is as timid as a hare , shy in the presence of strangers .
这小姑娘胆子特别小，怕人。 |
| 9. | The leaf was allowed to photosynthesize in the presence of radiocarbon .
叶子被允许同放射性碳进行光合作用。 |
| 10. | He had laid bare his agony of grief in the presence of these two men .
他竟然在那两个人面前，暴露了自己惨痛的心境。 |
