YOU SAID:
Be sure to stretch before engaging in rigorous physical activity.
INTO JAPANESE
必ず厳密な物理的な活動に従事する前にストレッチしてください。
BACK INTO ENGLISH
Be sure to stretch before make sure to engage in rigorous physical activities.
INTO JAPANESE
必ず厳密な物理的な活動に従事することを確認する前にストレッチしてください。
BACK INTO ENGLISH
Be sure to stretch before make sure to engage in rigorous physical activities.
You've done this before, haven't you.