There is no fixed rule.
没有一成不变的规则。
There are no hard-and-fast rules for success.
通往成功没有什么一成不变的规则。
the regular [irregular] conjugation
规则 [不规则] 变化
an irregular verB
不规则(变化的)动词
the quality of being steady--regular and unvarying.
稳定、规则、不变化的属性。
erratic variation in time series
时间序列的不规则变动
the quality of being unsteady--varying and irregular.
不稳定、容易变化和不规则的属性。
About Force Majeure Principles and Chang eable Situation Ones;
不可抗力规则不能替代情势变更规则
(grammar) of verbs not having standard (or regular) inflection.
（语法）指有不规则变形的动词。
Never change your position without a good reason based on set rules.
没有规于规则的良好理由，不要改变你的头寸。
the stomach mucosa was irregularly blackened.
胃粘膜成不规则状变黑。
irregularly varying service
不规则变化使用载荷
In English" to have" conjugates irregularly.
英语中“tohave”变化不规则。
Depositum irregulare
不规则寄托，变例寄托
A look A be a regular verb , but y see Z be an Irregular verb
"看"是规则变化动词,而"看见"是不规则变化动词
"Look" is a regular verb, but "see" is an irregular verb.
"看"是规则变化动词,而"看见"是不规则变化动词。
having or caused by an irregular surface.
有不规则表面或由不规则表面引起的。
the verb " keep " and " see " are irregular in their inflection
"keep"与"see"这两个动词的词形变化是不规则的