In 20 grade 1 ulcers (92%), no virulence genes were identified whereas these genes were present in all but one grade 2-4 ulcers.
除了1名病人外， 致病基因在所有2-4级溃疡病人中都被检测到，而在1级溃疡病人中，20名（92%）未检测出 致病 基因。
Recently, I saw a little boy at school. He is one grade younger than me and he is very cute. In particular, he is so similar with my classmate!
小男孩儿是我给他起的名字，他是省招班的，成绩应该很好吧！但他又不是那种只认学习的人，这一点是很让我颇为欣赏的。
Improvement of visual acuity of one grade or more or increase of 0.1 by acuity chart, and improvement of visual field were defined as effective.
提高一个级别或者视力表检查提高0 1为有效，视野缺损的改善也为有效。
The result shows that there has been one type (or one grade) of every landscape factor which is dominating over the area of surrounding region of each city.
结果表明，在大多数城市周边地区，各侵蚀景观因子都有一种类型(或级别)，其面积分布系数较大，居支配地位。
The research used a method of questionnaire combination with eye view movement experiment to investigate the effects of illustrations in new mathematic textbook of primary one grade.
本研究采用问卷调查与眼动实验相结合的方法，对小学一年级数学新课本中的插图效果进行考察。
The correction character of this machine is simple for its controlling system. It has only one grade calculating amplifer, one grade power complifer, and so less accidents and easy maintenance.
该纠偏机的特点是控制系统简单，只有一级运算放大器和一级功率放大器，故障机遇少，维修极为方便。
One out of ten American 8th grade students in 2016 spent 40 hours a week or more playing video games.
2016年，美国八年级学生中有十分之一的人每周会拿出40个小时或更多的时间玩电子游戏。
Yet, she noted, many young people are especially unwilling to take risks at school afraid that one low test score or poor grade could cost them a spot at a selective university.
然而，她指出，许多年轻人尤其不愿意在学校冒险，担心考试分数低或成绩差会让他们失去进入名牌大学的机会。
One of his sixth-grade students, a recent immigrant, was gradually falling behind, resisting his teacher's best efforts.
他的一个六年级学生是一个新移民，这名学生抵制他老师付出的最大努力，逐渐掉队。
With one of my children, the powerful girl in their group of four friends convinced the others—in second grade—to ditch my daughter at recess.
我的孩子就有一个，她们四个朋友的团体中的有感召力的女孩说服了其他人——在二年级——在课间孤立我女儿。
She noted, many young people are especially risk averse at school—afraid that one low test score or mediocre grade could cost them a spot at a selective university.
她指出，许多年轻人尤其不愿意在学校冒险，担心一次考试的分数低或成绩差会让他们失去进入名牌大学的机会。
One study of ninth-grade students found that 50 percent of friendships among ninth graders changed from one month to the next, signaling striking instability in friendships.
一项对九年级学生的研究发现，在九年级学生中，50%的友谊每个月都会发生变化，这表明友谊极其不稳定。
One day in fourth grade, our teacher gave us a project in class.
四年级的一天，我们的老师在课堂上给我们一个话题。
To the Editor, I am writing as a member of One on One, the sixth grade mentoring (指导) group.
致编辑：我是六年级指导小组“一对一”的成员。
By the end of the sixth grade, Teddy had become one of the smartest children in the class.
到六年级结束时，特迪已经成为了班上最聪明的孩子之一。
One day when he was in Grade 11, Johnnie went into school psychologist's office to ask for help.
在他11年级的时候，有一天，约翰尼走进学校心理医生的办公室寻求帮助。
The summer before my eighth grade I was one of a group of boys that a neighboring farmer hired to work in his field.
在我上八年级之前的那个夏天，我和一群男孩一起，被邻家的一个农夫雇佣到田里干活。
I had only focused on the fact that it was another school project and one I wanted to get a good grade on.
我只是注意到这样一个事实，这是学校的另一个项目，而且我想在此项目上取得好成绩。
One day a new girl, Josie, joined her sixth-grade class, and the new girl was asked to say three things about herself.
一天，一个新来的女孩乔茜加入了她六年级的班级，这个新来的女孩被要求说说三件有关她自己的事情。
He had told us to expect one and had warned us it would be included in the final grade.
他曾告诉我们会有一次，并警告我们这将包括在最终成绩中。
One day in the second grade, our class went on a weekend ramble in the countryside.
读二年级时，有一天，我们班到乡村进行周末漫步。
Moving up from tenth to eleventh grade was a major one.
从十年级升到十一年级是个重要的阶段。
On average, the kids increased their writing abilities by 2.1 grade levels and their math by 2.9 grade levels within one school year.
平均来说，孩子们在一个学年内提高了2.1个年级的阅读能力和2.9个年级的数学能力。
No wonderwe have only one man who can make the grade in men's tennis – and hehad to go to Spain for training.
那怪我们仅有一个男子网坛里拔尖的人——而且他还不得不去西班牙训练。
There were 45 students in one second-grade class, and the teacher had them well under control.
在一个二年级班，通常有45名学生，教师对他们进行有效的管理。
I read him checklists, learning words like “aileron, ” “magnetos, ” and “pitot” that no one else in my first-grade class knew.
我给他念设备清单，学会了很多其他一年级学生都不认识的词，像“副翼”、“磁发电机”和“空速管”。
This unassuming primary school just off Kangping Lu is where Yao Ming first experienced a shooting competition, when he was in grade one.
这所简单的小学就在康平路上，而就在这里姚明第一次经历他的投篮比赛在他一年级的时候。
So my primary school grade one, but also for the first time on school so successfully concluded.
就这样我的小学一年级，也是平生第一次上学堂就这样圆满结束。
But tree and bush are hardly that, since there is no way to define a tree versus a bush. The two categories grade insensibly into one another.
但树和灌木就是很难区分的，因为没有一种方法来区分一棵树和一株灌木，其中一种不知不觉地渐变为另一种。
But tree and bush are hardly that, since there is no way to define a tree versus a bush. The two categories grade insensibly into one another.
但树和灌木就是很难区分的，因为没有一种方法来区分一棵树和一株灌木，其中一种不知不觉地渐变为另一种。
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