If you tell someone that it is advisable to do something, you are suggesting that they should do it, because it is sensible or is likely to achieve the result they want.
例句
Because of the popularity of the region, it is advisable to book hotels or camp sites in advance...鉴于该地区很受人们青睐，最好提前预订旅馆或宿营地。It is generally not advisable for expectant mothers to travel by air after the 28th week of pregnancy.怀孕28周以后的准妈妈一般不宜乘坐飞机出行。