

O sistema está muito lento esta manhã.
Temos de atualizar o sistema esta semana.
Os nossos sistemas não funcionam bem juntos.
"o sistema" is in the lesson "Designer" (Level 43), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.