①I would prefer full-time， but I can work part-time if that is all that is available.

参考译文：我会更喜欢/中意全职工作，但是如果全部都是兼职工作，我也能做.
②Interviewer：What salary do you expect？

参考译文：面试者：你期望的薪水是多少呢？
  Applicant：A wage suitable to the position with the opportunity to advance.

参考译文：求职者：适合该职位且有提升机会的工资就可以了.

参考译文：与该职位适合且有晋升的机会的工资就行了.

参考译文：与该工资向事宜，且有提升的机会就可以了.

请问其中的if that is all that is available和A wage suitable to the position with the opportunity to advance.要怎么翻译？

(1)if that is all that is available 

=If that is what is available

翻译：如果那时所有可获得的工作）

（available  adj.  可获得的; 有空的; 可购得的; 能找到的;）

Since 1978, the amount of money available to buy books has fallen by 17%. 

自1978年以来，可用于采购图书的经费已经减少了17％。

There are three small boats available for hire...  

有3艘小船可供出租。

(2)A wage suitable to the position with the opportunity to advance

（备注：以上修饰名词形容词短语可以改为一个定语从句）

A wage which/that is suitable to the position with the opportunity to advance.

短语语法解析：

名词：a wage （一份工资）

修饰该名词的后置定语：suitable to the position with the opportunity to advance .(定语为一个形容词短语，相当于一个后置定语从句的简化版本。）

（适合于这份具有提升机会的的职位）

（与这个职位相适宜且具有提拔的机会）

备注：the position 后面还带有一个介词短语作后置定语

with the opportunity to advance, 其结构为

with +名词+to do 后置定语

with 带有/具有

the opportunity to advance=提拔/提升的机会

动词不定式做后置定语修饰名词the opportunity机会

改为定语从句的翻译：

A wage which/that is suitable to the position with the opportunity to advance.

参考译文：合适于该职位的薪水，且这个职位具有提升/提拔的机会。