Prepositions that can be omitted include: "Dui" and "Duiyu" that marktarget argument;
可以省略介词的情况有：标识客事论元的介词“对、对于”可以省略；
2
As an automatic decision-making assistance system, it can decide ship position relative to the continent, marktarget position, assist navigation, and avoid the danger.
作为一个自动决策辅助系统，能连续确定船舶相对于大陆的位置、标定目标的位置，辅助导航和避险。
3
After you mark the changes again, the transformation merges the source code changes into the target UML model.