是一个难题 - 翻译成英语

• a challenge
• is a problem
• is difficult
• a puzzle
• is a dilemma
• been a problem
• of a conundrum
• is the rub

在 中文 中使用 是一个难题 的示例及其翻译为 英语

Lubin：我们清楚用户体验会是一个难题。
Lubin: I think we knew that user experience was problematic.

时间对我来说的确是一个难题。
Time is definitely an issue for me.

选择适当的学习率是一个难题。
Selecting an appropriate learning rate can be challenging.

对许多人来说，婚姻是一个难题。
For most people, marriage is a challenge.

今天对某些人来说，它仍是一个难题。
Today it is still a problem for some.

如何充分满足这些期望是一个难题。
Fully meeting those expectations is a challenge.

对部分人来说，语言障碍是一个难题。
For some, language barriers were an issue.

网络创业对许多人来说确实是一个难题。
Internet Marketing is really a problem for many people.

不过，接送孩子依然是一个难题。
The upbringing of the children, however, remains a problem.

两个法庭的法官的地位是一个难题。
The question of the status of the judges of both Tribunals is a difficult issue.

和平进程过程中资金不足依然是一个难题。
Insufficient funding during peace processes remains a difficult problem.

贫困、艾滋病流行以及暴力行为猖獗在今天仍然是一个难题。
Poverty, the AIDS pandemic and violence remain a problem.

协调对外和对内情报工作始终是一个难题。
Coordinating domestic and foreign intelligence continues to be a challenge.

不过，筹资的可预测性仍然是一个难题。
However, the predictability of funding remains a problem.

少年和青年的艾滋病毒感染率仍然是一个难题。
HIV infection among adolescents and young people also continues to be a challenge.

对于Nuno来说这是一个难题。
So that's a challenge to Nuno.

但是，强制实施这些政策是一个难题。
However, we recognize that enforcing these policies is challenging.

确定综合性机构的优先事项是一个难题，突出的例子是欧洲联盟委员会。
Priority setting in integrated agencies, notably the European Commission, was a challenge.

但这仍是一个难题，因为法律不一定保护举报人(A/HRC/16/56,第62段)。
It remains a challenge, however, that the law does not necessarily protect persons who make a report(A/HRC/16/56, para. 62).

但VIP的性能检测是一个难题，其性能好坏取决于其板内的真空度的高低。
However, VIP performance testing is a problem, its performance is good or bad depends on the level of vacuum inside the board.