Mathematics is not a spectator sport; to understand it, one must engage with it actively.
数学不是一项观赏性运动；要理解它，必须积极参与其中。
Efficient market theory is correct in that there are no gross inefficiencies， but we look at anomalies that may be small in size and brief in time.
Sustainable fishing is not an option; it is a necessity for survival.
我不懂我们是否有着各自的命运，还是只是到处随风飘荡。