experimental(ly); tentative(ly)
- 性能試験をする
- conduct [run] an efficiency test ((on a new model))
- 試験的に使用してみる
- give a thing a trial/try using a thing to see how it works
- この新式ガスストーブは試験中だ
- This new gas heater is being tested.
- この新薬はまだ試験段階にある
- This new medicine is still in the experimental stage.
- 新車は試験済みだ
- The new car has successfully passed the tests it was subjected to.