Observer recordings of cloud cover from boats are often taken by sailors who are not specialists in the field, and can be very subjective.
船上观测员的云层记录往往由船员担任，而他们不是这一领域的专家，观测难免很主观。
Other observer groups were also severely restricted in the number of people they were able to field in the south.
其他监督小组也由于人员有限，也无法对南部地区进行实地监督。
Some schools may cut back on field trips. (News &Observer, North Carolina)
一些学校可能会消减实地旅行活动。
应用推荐