例句與造句

1. In absence of a seashore sign or presence of a stratosphere sign, pneumothorax is likely . "'B-lines "'or " comet trails " are echogenic bright linear reflections beneath the pleura that are usually lost with any air between the probe and the lung tissue and therefore whose presence with seashore sign indicates absence of a pneumothorax.
2. It's difficult to find linear reflection in a sentence. 用linear reflection造句挺難的