a hard protective sheath (as secreted by certain protoctists, for example)
双语例句
1. Looking only at paid apps, Lorica also found that 6.3% of all sellers have had an application that made it to the app Store's "Top paid apps" list, though about 80% of these were one-hit wonders.
2. Looking only at paid apps, Lorica also found that 6.3% of all sellers have had an application that made it to the app Store's "Top paid apps" list, though about 80% of these were one-hit wonders.