61.  By reading, we will learn the circumstances under which the words can be used or shouldn't be used.

62.  You do have much more time under your control.

63.  There are various boundaries among groups and races and many people are groaning under these boundaries.

64.  Under the environment of fierce competition, we should bury ourselves in remaining invincible in domestic and international markets.

65.  Many people tend to live under the illusion that the boundaries among groups and races impede individuals to present themselves, but they just fail to realize that the boundaries can provide them a better environment for life and development.

66.  It's so bad that we often can't know ourselves or others correctly under the confusion caused by stereotypes, like the Asian-American student in Stereotyping.

67.  However, if the reality is not under considered, which way should we choose?

68.  Second, I could play online games under less restriction.

69.  Under this premise, it goes without saying which way is better, by reading a lot or by memorizing long lists.

70.  If we are preparing for some examinations and under the condition that we are rich in time, it's not a bad choose to challenge yourself.