耶稣 is the transliteration of 'Jesus' (from Latin Iesus via early Jesuit missionaries), and
基督 transliterates 'Christ' (from Greek Christos, meaning 'anointed one'). The full form
耶稣基督 is standard in Chinese Bibles and church usage; in casual speech believers may simply say
耶稣 or
主 (zhǔ, 'the Lord').