The school will only allow this in special circumstances.

学校只有在特殊情况下才会同意这种事。

《牛津词典》

If you are asking for a name, only allow a-z and a-z.

如果您被要求输入一个名称，那么只允许a - z和a - z。

youdao

Most browsers only allow two connections per host name.

大多数浏览器只允许每个主机名有两个连接。

youdao

Barak says Mr.Netanyahu has made concessions: Israel says it will not build new settlements, but will only allow "natural growth,"

VOA: standard.2009.07.03

The ones that are most important in physiology are ones that only allow ions to go through: sodium, potassium, chloride, calcium, bicarbonate.

在生理学上这种,只能允许某种离子通过的通道十分重要,这些离子包括钠离子,钾离子,氯离子,钙离子和碳酸氢根离子

耶鲁公开课 - 生物医学工程探索课程节选

Essentially it would only allow for us to bond to two hydrogen atoms.

本质上，它只能允许我们,和两个氢原子成键。

麻省理工公开课 - 化学原理课程节选

The IRS forbids loans from most IRAs, and will only allow early withdrawals for medical or educational expenses.

FORBES: Parents' Tough Choices For Repaying Student Loans

But both Skype and FaceTime only allow communications with other Skype or FaceTime users.

FORBES: Google's Chrome Browser Now Contains A Disruptive New Communications Framework

In Shanghai, for example, authorities only allow families to own up to two residences.

WSJ: In Shanghai, High Prices Keep Lid on Real-Estate Stimulus