This castle has a nightingale floor installed to prevent enemy intrusion.

He outsmarted his competitors by using a contrarian business strategy.

He succeeded in business by going against the grain.

She secured the fabric with pins and started sewing.

When her son goes to school, the mother always says 'see you later'.

Have a good day at school, son.

He grieved for her death, feeling deeply saddened.

The meeting will start at 10 a.m.

He jumped over the ditch.

He learned Japanese through self-study.