因為國貿單據必須要細心，而且都是英文，也需要使用英文和客戶溝通，所以英

因為國貿單據必須要細心，而且都是英文，也需要使用英文和客戶溝通，所以英文的能力是非常重要的，

結果 (英文) 1:

Because international trade documents must be carefully prepared and are all in English, and you need to use English to communicate with customers, so the ability to speak English is very important.

結果 (英文) 2:

Because international trade documents must be meticulous and all in English, and English communication with customers is also required, English proficiency is very important,

結果 (英文) 3:

Because international trade documents must be careful, and they are all in English, and they also need to communicate with customers in English, so the ability of English is very important.