| 1. | Positive frequencies are produced by anticlockwise rotation and negative frequencies by clockwise rotation .
正频率是逆时针旋转产生的，而负频率是顺时针旋转产生的。 |
| 2. | Positive frequencies are produced by anticlockwise rotation and negative frequencies by clockwise rotation .
正频率是用逆时针旋转来产生，而负频率是用顺时针旋转来产生。 |
| 3. | Pcr detection showed that 12 plants were positive and the positive frequency was 4 . 6 %
提取kan抗性生菜植株叶片dna进行pcr检测，得到12株阳性植株。 |
| 4. | 2 . we studied the relationship between the locking bandwidth and the injected signal light intensity and verified that the locking bandwidth is asymmetric . the negative frequency detuning is larger than positive frequency detuning
实验证实了锁频范围是不对称的，负失谐范围大于正失谐范围，并且注入功率越大，锁定范围越大。 |
| 5. | Especially , in the solution of pulse spectrum , the negative frequency form of nls equation should be solved by the negative frequency form of fourier transformation , while the positive frequency form of nls equation is solved by the positive frequency form of fourier transformation
尤其在脉冲频谱的求解问题中，如果采用负频形式的非线性薛定谔方程则必须选取负频形式的傅里叶变换；如果采用正频形式的非线性薛定谔方程则必须选取正频形式的傅里叶变换。 |
| 6. | It indicated that 76 . 5 percent of positive frequency of all the plants was achieved by using southern dot hybridization , 87 . 5 percent of the plants with gus positive activity was gotten by pcr southern blotting and 42 percent of the plants with gus positive activity was gotten by southern blotting
转基因卡那霉素抗性植株中， gus表达阳性率为43 ，随机抽样的方法进行杀虫肽和npt基因的pcr检测阳性率均为100 。经过分子生物学检测表明， southern斑点杂交76 . 5植株表现阳性。 |
