complication (n)
/ˌkɑːm.plɪˈkeɪ.ʃən/ 

sự phức tạp

difficulty, complex situation

email (n)
/ˈiˌmeɪl/

thư điện tử, email

the system for using computers to send messages over the internet

mention (v)
 /ˈmen.ʃən/

đề cập

to refer to something or someone

formal (a)
/ˈfɔːr.məl/

trang trọng, trang nghiêm

public or official

document (n)
/ˈdɑk·jə·mənt/

tài liệu

an official paper or book that gives information about something, or that can be used as evidence or proof of something

courier (n)
/ˈkʊr.i.ɚ/ 

người đưa thư, chuyển phát

a messenger, an official delivery person

proof (v)
/pruːf/

tìm lỗi

to look for errors

two-sided (a)
 /tuː saɪdid/

hai mặt, hai phía

having two sides or aspects

petition (n)
/pəˈtɪʃ.ən/

sự kiến nghị

a formal, written request

layout (n)
/ˈleɪ.aʊt/

cách bố trí

a format; the organization of material on a page

revise (v)
/rɪˈvaɪz/

sửa lại

to look at or consider again an idea, piece of writing, etc. in order to correct or improve it

attachment (n)
/əˈtætʃ·mənt/

sự đính kèm

something you send with a letter, contract, or other document to give extra information

make sure (phrase)
/meɪk ʃɔːr/

chắc rằng

to look and/or take action to be certain that something happens, is true, etc.

error-free (a)
/ˈer·ər fri/

không có lỗi

containing no mistakes; faultless

single-sided (a)
/ˈsɪŋ·ɡəl sɑɪdid/

một mặt, một phía

having one side or aspect

beforehand (r)
/bɪˈfɔːr.hænd/

trước, từ trước

in advance, in anticipation

correspondence (n)
/ˌkɔr·əˈspɑn·dəns/

thư từ, thư tín

letters written from one person to another, or the activity of writing and receiving letters

assemble (v)
 /əˈsem.bl̩/

tập hợp

to put together

fold (v)
/foʊld/

gấp, gập

to bend the paper

recipient (n)
/rɪˈsɪp·i·ənt/

người nhận

a person who receives something